Elevator system that can compensate for the weight of the traveling cable

Abstract

This invention relates to an elevator system capable of compensating for the weight of a traveling cable, comprising: a car; a car frame including an upper beam, a left side beam, a lower beam, and a right side beam, the middle portion of the upper beam for connecting a traction rope, and the lower beam for supporting the car; a traction rope, the bottom end of which is connected to the upper beam of the car frame; a traveling cable suspended from a first end of the upper beam or the first end of the lower beam, the traveling cable generating a first torque on the center of gravity of the car frame; the elevator system further includes: a torque balancing device for generating a second torque on the center of gravity of the car frame, the second torque being substantially equal in magnitude and opposite in direction to the first torque. This invention balances the weight of the traveling cable by employing an asymmetrical arrangement of the compensating rope and / or an eccentric arrangement of the traction rope suspension point, thereby largely or completely eliminating the eccentric torque generated by the weight of the traveling cable on the car frame, and thus eliminating the influence on the rolling guide shoes. No additional devices are added, resulting in low cost and significant effectiveness.

Description

Technical Field

[0001] This invention relates to the field of elevator equipment technology, and more specifically, to an elevator system capable of compensating for the weight of the traveling cable. Background Technology

[0002] The traveling cable is a component of an elevator. Due to its own weight and the fact that its suspension point does not coincide with the elevator's suspension center, it generates an off-center load moment on the car frame. This load is then transmitted to the rolling guide shoes and guide rails, resulting in an off-center load force. The higher the lifting height, the greater the off-center load force, which reduces the elevator's running comfort and the lifespan of the rolling guide shoes. For single-car or multi-car elevator systems, the off-center load is even more severe and its impact is more significant when the traveling cable's suspension point is located outside the elevator car's running path and far from the car frame's suspension center.

[0003] Currently, the methods for balancing the weight of the traveling cable on the market are generally to use fixed counterweights at symmetrical positions of the traveling cable suspension point or to add an extra traveling cable. The former cannot achieve complete balance, while the latter is very expensive and difficult to implement in multi-car elevator systems due to space requirements.

[0004] The traveling cable moves up and down with the elevator, and its weight suspended at the end of the car changes constantly. Therefore, a dynamic corresponding weight is needed to balance the off-center load on the rolling guide shoes.

[0005] Therefore, there is a need in the art for a low-cost solution that can dynamically balance traveling cables with dynamically changing weight. Summary of the Invention

[0006] In view of the above problems, the present invention is proposed to provide an elevator system that can compensate for the weight of the traveling cable, thereby overcoming or at least partially solving the above problems.

[0007] This invention provides an elevator system capable of compensating for the weight of a traveling cable, comprising: a car; a car frame including an upper beam, a left side beam, a lower beam, and a right side beam, wherein the middle portion of the upper beam is used to connect a traction rope, and the lower beam is used to support the car; a traction rope, the bottom end of which is connected to the upper beam of the car frame; a traveling cable suspended from a first end of the upper beam or a first end of the lower beam, the traveling cable generating a first torque on the center of gravity of the car frame; the elevator system further comprising: a torque balancing device for generating a second torque on the center of gravity of the car frame, the second torque being substantially equal in magnitude and opposite in direction to the first torque.

[0008] In a preferred embodiment of this application, the elevator system further includes a first suspension bracket, through which the traveling cable is suspended from the first end of the upper beam or the first end of the lower beam.

[0009] In a preferred embodiment of this application, the projection of the suspension point of the traveling cable on the first suspension bracket onto the horizontal plane is located outside the projection plane of the car onto the horizontal plane.

[0010] In a preferred embodiment of this application, the torque balancing device includes two compensating ropes. When the traveling cable is suspended at the first end of the upper beam, the two compensating ropes are respectively suspended at the first end and the second end of the lower beam. The resultant force of the two compensating ropes generates a second torque on the center of gravity of the car frame that is equal in magnitude and opposite in direction to the first torque.

[0011] In a preferred embodiment of this application, the elevator system further includes two second suspension brackets, and the two compensating ropes are respectively suspended from the first and second ends of the lower beam through one of the second suspension brackets.

[0012] In a preferred embodiment of this application, the torque balancing device includes two compensating ropes. When the traveling cable is suspended at the first end of the lower beam, the two compensating ropes are respectively suspended at the first end and the second end of the upper beam. The resultant force of the two compensating ropes generates a second torque on the center of gravity of the car frame that is equal in magnitude and opposite in direction to the first torque.

[0013] In a preferred embodiment of this application, the elevator system further includes two second suspension brackets, and the two compensating ropes are respectively suspended from the first and second ends of the upper beam through one of the second suspension brackets.

[0014] In a preferred embodiment of this application, the torque balancing device is configured such that the projection of the suspension point of the traction rope on the upper beam of the car frame onto the horizontal plane does not coincide with the projection of the center of gravity of the car frame onto the horizontal plane, so that the traction rope generates a second torque on the center of gravity of the car frame that is equal in magnitude and opposite in direction to the first torque.

[0015] In a preferred embodiment of this application, the elevator system further includes a static balance block, which is suspended at the second end of the upper or lower beam of the traveling cable suspension. The projection of the straight line containing the suspension point of the traveling cable and the suspension point of the static balance block on the horizontal plane passes through the projection of the center of gravity of the car frame on the horizontal plane, and the suspension point of the static balance block and the suspension point of the traveling cable are respectively located on both sides of the center of gravity of the car frame.

[0016] This invention, without adding any structure, generates a dynamically changing off-center load moment on the center of gravity of the car frame by the resultant point of the asymmetrical setting of the two existing compensating ropes or the eccentric setting of the suspension point of the traction rope. This balances the first dynamically changing torque of the traveling cable on the center of gravity of the car frame, thereby eliminating the influence on the rolling guide shoe. It is low in cost and has significant effects. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the elevator system that can compensate for the weight of the traveling cable provided by the present invention;

[0018] Figure 2 for Figure 1 Top view of the two compensating ropes being set asymmetrically;

[0019] Figure 3 for Figure 1 A bottom view of the two compensating ropes being set asymmetrically;

[0020] Figure 4 for Figure 2 Simplified diagram of the applied torque;

[0021] Figure 5 for Figure 1 Top view of the traction rope with eccentric setting;

[0022] Figure 6 for Figure 5 Simplified diagram of the applied torque;

[0023] Figure 7 This is a schematic diagram showing the positions of two cars running in the same hoistway.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Traveling cable

[0026] 2 Rolling guide shoes

[0027] 3. Compensation rope

[0028] 4. Car frame

[0029] 5. Car

[0030] 6. Traction rope

[0031] 7 Static balance blocks

[0032] 101 First suspension bracket

[0033] 301 Second Suspension Bracket

[0034] 302 The point of force resultant from the two compensating ropes

[0035] 41 Raising the roof beam

[0036] 42 Lower beam

[0037] 43. Left side beam

[0038] 44 Right side beam

[0039] 4101 The first end of the upper beam

[0040] 4102 The second end of the upper beam

[0041] 421 Crossbeam

[0042] 422, 423 extension plates

[0043] 4201 The first end of the lower beam

[0044] 4202 The second end of the lower beam

[0045] 4103 The suspension point of the traction rope on the upper beam

[0046] 4104 Center of gravity of the car frame

[0047] 701 Third suspension bracket.

[0048] It should be understood that the accompanying drawings are not drawn to scale, but rather illustrate various features that are presented in a slightly simplified manner to explain the basic principles of the invention. In the accompanying drawings of this invention, the same reference numerals denote the same or equivalent parts of the invention. Detailed Implementation

[0049] Reference will now be made in detail to various embodiments of the invention, examples of which are shown in the accompanying drawings and described below. Although the invention will be described in conjunction with exemplary embodiments thereof, it will be understood that this specification is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only the exemplary embodiments thereof, but also various alternatives, modifications, equivalents, and other embodiments included within the spirit and scope of the invention as defined in the appended claims.

[0050] To more clearly illustrate the positional relationships of the various structures, a three-dimensional Cartesian coordinate system has been added to the attached drawings. The x-axis and y-axis are both axes on the horizontal plane. The positive direction of the x-axis is parallel to the car door 501 and points to the side of the traveling cable 1. The positive direction of the y-axis is the direction of the car frame 4 pointing to the car door 501. The z-axis is a vertical axis, and the positive direction of the z-axis is vertically upward. The x-axis points in the same direction in different drawings, and the y-axis also points in the same direction.

[0051] In the following description, various exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0052] The present invention provides an elevator system that can compensate for the weight of the traveling cable, comprising: a car 5, a car frame 4, a traveling cable 1, and a torque balancing device.

[0053] Among them, car 5 is used to carry people or goods.

[0054] The car frame 4 includes an upper beam 41, a left side beam 43, a lower beam 42, and a right side beam 44. The upper beam 41 is used to connect the traction rope 6, the lower beam 42 is used to support the car 4, and the car frame 4 has a center of gravity 4104.

[0055] The traction rope 6 has its bottom end connected to the top of the car frame 4 (i.e., the upper beam 41) and is used to pull the car frame 4 up and down.

[0056] The traveling cable 1 is suspended from the first end 4101 of the upper beam 41 of the car frame 4, and the traveling cable 1 generates a first torque on the center of gravity 4104 of the car frame 4. The traveling cable 1 moves up and down with the elevator, causing a change in the force exerted on the elevator by the traveling cable 1 due to its weight, thus creating the first torque. It also changes as the elevator moves up and down.

[0057] A torque balancing device is used to generate a second torque on the center of gravity of the car frame 4. The second torque is substantially equal in magnitude and opposite in direction to the first torque, eliminating or reducing the off-center load force generated by the torque of the traveling cable on the rolling guide shoe 2.

[0058] The following will provide a detailed explanation of how the torque balancing device generates the second torque, with reference to the accompanying drawings and embodiments.

[0059] Example 1

[0060] See Figure 1-4 As shown, this invention relates to an elevator system capable of compensating for the weight of the traveling cable, comprising: a car 5, a car frame 4, a traveling cable 1, and two compensating ropes 3. It should be noted that, for clearer illustration of the positional relationships of the main components, Figure 2 and Figure 3 The compensating rope 3 and the traction rope 6 are not shown.

[0061] Among them, car 5 is used to carry people or goods.

[0062] The main body of the car frame 4 is a rectangular frame, including an upper beam 41, a left side beam 43, a lower beam 42, and a right side beam 44. The car frame 4 has a center of gravity 4104.

[0063] The lower beam 42 is used to support the car 5.

[0064] The middle part of the upper beam 41 is used to connect the traction rope 6, and the first end 4101 of the upper beam 41 is used to suspend the traveling cable 1.

[0065] See Figure 3 The lower beam 42 includes a crossbeam 421 and extension plates 422 and 423 located at both ends of the crossbeam 421. The crossbeam 421 carries the car 4. The extension plates 422 and 423 are located on opposite sides of the crossbeam 421 (the extension plate 422 is located on the negative y-axis side of the crossbeam 421, and the extension plate 423 is located on the positive y-axis side of the crossbeam 421). The end of the extension plate 422 away from the crossbeam 421 is the first end 4201 of the lower beam 42, and the end of the extension plate 423 away from the crossbeam 421 is the second end 4202 of the lower beam 42. The first end 4201 and the second end 4202 of the lower beam 42 are used to carry two compensating ropes 3 respectively.

[0066] The traveling cable 1 is suspended at the first end 4101 of the upper beam 41, and the traveling cable 1 generates a first torque on the center of gravity 4104 of the car frame 4.

[0067] Typically, the traveling cable 1 is suspended from the first end 4101 of the upper beam 41 of the car frame 4 via the first suspension bracket 101 (see reference). Figure 2 Then, the point where the traveling cable 1 applies force to the car frame 4 is located... Figure 2 The accompanying cable is suspended at point 1011 on the first suspension bracket 101.

[0068] Two compensating ropes 3 are respectively suspended from the first end 4201 and the second end 4202 of the lower beam 42 of the car frame 4. Similar to the traveling cable 1, the two compensating ropes 3 move up and down with the elevator, causing changes in the force exerted on the elevator by the compensating ropes 3 due to their weight. The resultant force point 302 of the two compensating ropes 3 generates a second torque on the center of gravity 4104 of the car frame 4. Second torque With the first torque They are equal in size and opposite in direction, and their movements change as the elevator moves up and down.

[0069] The two compensating ropes 3 have the same weight, meaning they exert the same force on the car frame 4. Simply adjusting the suspension position will adjust the position of the resultant force point, thereby generating a second torque.

[0070] Generate a second torque With the first torque Forces of different magnitudes have different lever arms, but their product is equal, so the torque can be equal.

[0071] In existing elevators, the two compensating ropes 3 are symmetrically arranged, and the resultant force point of the two compensating ropes 3 coincides with the horizontal projection of the center of gravity 4104 of the car frame 4. The sum of the torques of the two ropes on the horizontal plane of the center of gravity 4104 of the car frame 4 is zero (i.e., no horizontal torque is generated). However, in this embodiment, the two compensating ropes 3 are suspended asymmetrically. The resultant force point of the two compensating ropes 3 no longer coincides with the horizontal projection of the center of gravity 4104 of the car frame 4, generating a torque. This torque is used to balance the torque of the traveling cable 1, eliminate or reduce the eccentric load force generated by the torque of the traveling cable on the rolling guide shoe 2, and reduce the wear on the rolling guide shoe 2. The two asymmetrically arranged compensating ropes 3 here are the torque balancing device mentioned above.

[0072] According to the formula for torque The direction of the torque is perpendicular to the direction of the force. Whether it's the weight of the traveling cable 1 or the force exerted on the car frame 4 by the resultant force of the compensating rope, it's all vertically downward (negative z-axis direction). Therefore, the first torque... Second torque All torques are perpendicular to the z-axis, meaning their projection onto the horizontal plane has the same direction and magnitude as the torque itself. Therefore, in the following illustrations, the projection of the torque onto the horizontal plane directly represents the magnitude and direction of the torque itself. At the same time, the components of the actual displacement vector on the z-axis will not be discussed; only its components on the horizontal plane will be discussed. For ease of explanation, the components of the displacement vector on the horizontal plane will also be used to represent the magnitude and direction of the displacement vector itself. This simplification does not affect the judgment and analysis of the torque.

[0073] Will Figure 1 The entire structure is projected onto the horizontal plane (i.e. Figure 1 (The plane containing the x-axis and y-axis) is used to obtain... Figure 2 ,right Figure 2 Simplified force analysis yields Figure 4 , Figure 4 The symbol × represents the direction of force perpendicular to the paper and inward (i.e., the direction of force is the negative z-axis).

[0074] The distance vector between the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 and the center of gravity 4104 of the car frame 4 is: The first force applied (i.e., the weight of the accompanying cable 1) The direction of ) is vertically downward (i.e., the negative direction of the z-axis), according to the formula for torque. The first torque generated by the traveling cable 1 on the center of gravity 4104 of the car frame 4 direction such as Figure 4 As shown; the distance vector between the resultant point 302 of the two compensating ropes 3 and the center of gravity 4104 of the car frame 4 is... The second force applied (and the weight of the two compensating ropes 3) The direction (proportional in magnitude and in the same direction) is vertically downward (i.e., the negative direction of the z-axis), according to the formula for torque. The second torque generated by the resultant point 302 of the two compensating ropes 3 on the center of gravity 4104 of the car frame 4 direction such as Figure 4 As shown.

[0075] To achieve the first torque With the second torque For the two vectors to cancel each other out (i.e., their vector sum is zero), two conditions must be met: first, they must be in opposite directions; and second, they must be equal in magnitude.

[0076] Regarding direction: First force Second Force The directions are the same and cannot be changed, in order to achieve the first torque. With the second torque The purpose of achieving opposite directions can only be achieved by adjusting the distance vectors of the two cables to be opposite directions. That is, the point of force of the traveling cable 1 (i.e., the suspension point 1011 on the first suspension bracket 101) and the resultant point 302 of the two compensating ropes 3 are located on both sides of the center of gravity 4104 of the car frame 4, and the projection of the straight line containing the suspension point 1011 on the first suspension bracket 101 and the resultant point 302 of the two compensating ropes 3 on the horizontal plane passes through the center of gravity 4104 of the car frame 4.

[0077] Regarding size: During elevator installation, once the installation point of the traveling cable 1 (i.e., suspension point 1011 on the first suspension bracket 101) and the resultant force point 302 of the two compensating ropes 3 are determined, they will not be changed. Therefore, the distance from the installation point of the traveling cable 1 (suspension point 1011 on the first suspension bracket 101) to the center of gravity 4104 of the car frame 4 (i.e., The size of the two compensating ropes 3, and the distance from the resultant point 302 of the two compensating ropes 3 to the center of gravity 4104 of the car frame 4 (i.e., the distance between the two compensating ropes 3 and the center of gravity 4104 of the car frame 4). The size of the elevator (1) is fixed after installation. However, as the elevator height increases (or decreases), the weight of the traveling cable 1 and the two compensating ropes 3 increases (or decreases). Second Force When the magnitude of the torque increases (or decreases) synchronously, the magnitude of the torque generated increases (or decreases) synchronously, in order to achieve a dynamic equilibrium.

[0078] First torque With the second torque If the direction is adjusted to the opposite direction, as long as the installation process is adjusted to the same size, the magnitude of the two torques will change synchronously at each height point of the elevator's rise and fall, thereby realizing the dynamic compensation of the eccentric load torque generated by the compensating rope 3 and the traveling cable 1.

[0079] In reality, in specific elevator application scenarios, the types of traveling cable 1 and compensating rope 3 that can be selected for the elevator are limited. Once the type is determined, that is, the weight increase with height is fixed, the best adjustment method is to adjust the distance between the two and the center of gravity 4104 of the car frame 4.

[0080] Specifically, refer to Figure 2 and Figure 3 The compensation rope 3 can be adjusted by moving its specific suspension position at the first end 4201 of the lower beam 42 towards the center of gravity 4104 of the car frame 4 (negative x-axis and positive y-axis), or by moving its specific suspension position at the second end 4202 of the lower beam 42 away from the center of gravity 4104 of the car frame 4 (negative x-axis and positive y-axis), or by moving both simultaneously (towards the negative x-axis and positive y-axis). The approximate distance can be calculated in advance based on relevant materials, or the specific distance of the compensation rope 3 can be adjusted directly at the lowest point of the elevator.

[0081] Furthermore, the projection of the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 onto the horizontal plane is located outside the projection plane of the car 5 onto the horizontal plane.

[0082] Furthermore, the elevator system capable of compensating for the weight of the traveling cable also includes two second suspension brackets 301, with each of the two compensating ropes 3 suspended from the first end 4201 and the second end 4202 of the lower beam 42 via a second suspension bracket 301.

[0083] Furthermore, the projections of the suspension points of the two compensating ropes 3 on the two second suspension brackets 301 onto the horizontal plane are located outside the projection plane of the car 5 onto the horizontal plane.

[0084] When it involves elevators with multiple cars, such as Figure 7 When the two cars 5 shown are running simultaneously in the same hoistway, if the traveling cable 1 and compensating rope 3 of the car 5 are located within the horizontal projection plane of the car 5, the traveling cable 1 and compensating rope 3 between the two cars 5 will interfere with each other and affect normal operation. Therefore, the traveling cable 1 and compensating rope 3 should be located outside the horizontal projection plane of the car 5.

[0085] Furthermore, the elevator system capable of compensating for the weight of the traveling cable also includes a static balance block 7 located at the second end 4102 of the upper beam 41. The projection of the straight line containing the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 and the suspension point of the static balance block 7 on the horizontal plane passes through the projection of the center of gravity 4104 of the car frame 4 on the horizontal plane. The suspension point of the static balance block 7 and the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 are located on opposite sides of the center of gravity 4104 of the car frame 4. Here, the weight of the static balance block 7 is fixed, i.e., its gravity is fixed.

[0086] Furthermore, the static balance block 7 is installed at the second end 4102 of the upper beam 41 via the third suspension bracket 701.

[0087] Furthermore, assuming the elevator system is at its highest point, the force required to balance the traveling cable 1 is... Static balance block 7 is set to gravity. Thus, all other things being equal, the maximum value of the forces that need to be balanced is determined by... Reduce to

[0088] It should be understood that Figure 2 , Figure 3 and Figure 4 The position of the resultant force point 302 of the two compensating ropes 3 in the diagram is only for illustration; its corresponding... The size is not necessarily larger than The size relationship between the two depends on the material of the traveling cable 1 and the compensating rope 3. If the density of the traveling cable 1 is more than twice the density of the compensating rope 3, The value is greater than

[0089] Although in the above embodiment, the traveling cable 1 and the compensating rope 3 are respectively disposed on the upper beam 41 and the lower beam 42, their positions can be changed without affecting the effect of the present invention. For example, the traveling cable 1 can be disposed on the lower beam, and the compensating rope 3 can be disposed on the upper beam.

[0090] This embodiment, without adding any structure, generates a dynamically changing second torque on the center of gravity of the car frame through the resultant force point of the asymmetrical setting of the existing two compensating ropes. This balances the dynamically changing first torque generated by the traveling cable on the center of gravity of the car frame, thereby eliminating the influence on the rolling guide shoe. It is low in cost and has significant effects.

[0091] Example 2

[0092] See Figure 1 , Figure 5 and Figure 6As shown, this invention relates to an elevator system capable of compensating for the weight of the traveling cable, comprising: a car 5, a car frame 4, a traveling cable 1, and a traction rope 6. It should be noted that the locations of the main components are shown for clearer illustration. Figure 5 The traction rope 6 is not shown.

[0093] The car 5, car frame 4, and traveling cable 1 in this embodiment are the same as those in the first embodiment. The difference is that the position of the traction rope 6 at the suspension point 4103 of the upper beam 41 is changed, thereby causing the traction rope 6 to generate a second torque on the car frame 4 that is equal in magnitude and opposite in direction to the first torque.

[0094] Typically, the traveling cable 1 is suspended from the first end 4101 of the upper beam 41 of the car frame 4 via the first suspension bracket 101 (see reference). Figure 5 Then, the point where the traveling cable 1 applies force to the car frame 4 is located... Figure 5 The accompanying cable 1 is suspended at a suspension point 1011 on the first suspension bracket 101.

[0095] The bottom end of the traction rope 6 is connected to the upper beam 41. The projection of the traction rope 6 on the horizontal plane at the suspension point 4103 of the upper beam 41 does not coincide with the projection of the center of gravity 4104 of the car frame 4 on the horizontal plane, so that the traction rope 6 generates a first torque on the center of gravity 4104 of the car frame 4. Second torques of equal magnitude and opposite direction

[0096] Generate a second torque With the first torque Forces of different magnitudes have different lever arms, but their product is equal, so the torque can be equal.

[0097] In existing elevators, the suspension point 4103 of the traction rope 6 coincides with the projection of the center of gravity 4104 of the car frame 4 on the horizontal plane. The torque of the traction rope 6 on the center of gravity 4104 of the car frame 4 on the horizontal plane is zero (i.e., no torque is generated in the horizontal direction). In this application, the suspension point 4103 of the traction rope 6 is set eccentrically, so that the projection of the suspension point 4103 of the traction rope 6 and the center of gravity 4104 of the car frame 4 on the horizontal plane no longer coincides, generating a torque. This is used to balance the torque of the traveling cable 1, eliminate or reduce the eccentric load force generated by the torque of the traveling cable on the rolling guide shoe 2, and reduce the wear on the rolling guide shoe 2.

[0098] According to the formula for torque The direction of the torque is perpendicular to the direction of the force. Whether it's the weight of the traveling cable 1 (vertically downwards) or the force exerted by the resultant force of the compensating rope on the car frame 4 (vertically upwards), both are vertical (along the positive or negative direction of the z-axis). Therefore, the first torque... Second torque All torques are perpendicular to the z-axis, meaning their projection onto the horizontal plane has the same direction and magnitude as the torque itself. Therefore, in the following illustrations, the projection of the torque onto the horizontal plane directly represents the magnitude and direction of the torque itself. At the same time, the components of the actual displacement vector on the z-axis will not be discussed; only its components on the horizontal plane will be discussed. For ease of explanation, the components of the displacement vector on the horizontal plane will also be used to represent the magnitude and direction of the displacement vector itself. This simplification does not affect the judgment and analysis of the torque.

[0099] Will Figure 1 The entire structure is projected onto the horizontal plane (i.e. Figure 1 (The plane containing the x-axis and y-axis) is used to obtain... Figure 5 ,right Figure 5 Simplified force analysis yields Figure 6 , Figure 6 In the diagram, × represents the direction of force perpendicular to the paper and inward (i.e., the direction of force is the negative z-axis), and · represents the direction of force perpendicular to the paper and outward (i.e., the direction of force is the positive z-axis).

[0100] The distance vector between the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 and the center of gravity 4104 of the car frame 4 is: The first force applied (i.e., the weight of the accompanying cable 1) The direction of ) is vertically downward (i.e., the negative direction of the z-axis), according to the formula for torque. The first torque generated by the traveling cable 1 on the center of gravity 4104 of the car frame 4 direction such as Figure 6 As shown; the distance vector between the suspension point 4103 of the traction rope 6 and the center of gravity 4104 of the car frame 4 is... The third force applied The direction of the traction force (i.e., the pulling force of traction rope 6) is vertically upward (i.e., the positive direction of the z-axis), according to the formula for torque. The second torque generated by the suspension point 4103 of the traction rope 6 on the center of gravity 4104 of the car frame 4 direction such as Figure 6 As shown.

[0101] To achieve the first torque With the second torque For the two vectors to cancel each other out (i.e., their vector sum is zero), two conditions must be met: first, they must be in opposite directions; and second, they must be equal in magnitude.

[0102] Regarding direction: First force and the third force The direction is opposite and cannot be changed, in order to achieve the first torque. With the second torque The opposite directions can only be achieved by adjusting the distance vectors of the two to be in the same direction, that is, the point of force of the traveling cable 1 (i.e. the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101) and the suspension point 4103 of the traction rope 6 are located on the same side of the center of gravity 4104 of the car frame 4, and the projection of the straight line containing the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 and the suspension point 4103 of the traction rope 6 on the horizontal plane passes through the center of gravity 4104 of the car frame 4.

[0103] Regarding size: During elevator installation, once the installation point of the traveling cable 1 (i.e., the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101) and the suspension point 4103 of the traction rope 6 are determined, they will not be changed. Therefore, the distance from the installation point of the traveling cable 1 (the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101) to the center of gravity 4104 of the car frame 4 (i.e., The size of the traction rope 6 and the distance from the suspension point 4103 of the traction rope 6 to the center of gravity 4104 of the car frame 4 (i.e., the distance between the suspension point 4103 of the traction rope 6 and the center of gravity 4104 of the car frame 4). The size is a fixed value after assembly.

[0104] As the elevator height increases (or decreases), the weight of the traveling cable 1 increases (or decreases), i.e., the first force... The magnitude increases (or decreases) synchronously, generating the first torque in the traveling cable 1. The magnitude of the force increases (or decreases) synchronously. And the third force... The magnitude of the traction force (i.e., the pulling force of the traction rope 6) is equal to the sum of the weights of the traction car frame 4, the car 5, the traveling cable 1, and the compensating rope 3. Among them, the gravity of the car frame 4 and the gravity of car 5 The size is fixed, and the weight of the accompanying cable 1 is... and the gravity of compensation rope 3 The magnitude of the third force increases (or decreases) with increasing (or decreasing) height. The magnitude of the third force (i.e., the traction force of traction rope 6) increases (or decreases) synchronously with the increase (or decrease) in height. The second torque generated The magnitude of the torque increases (or decreases) synchronously with the increase (or decrease) in height, thus generating the first torque in the traveling cable 1. The second torque generated by the traction rope 6 on the center of gravity 4104 of the car frame 4 The size of the particles increases or decreases synchronously to achieve a dynamic equilibrium.

[0105] First torque With the second torque If the direction is adjusted to the opposite direction, as long as the installation process is adjusted to the same size, the magnitude of the two torques will change synchronously at each height of elevator lifting, thereby realizing the dynamic compensation of the traction rope 6 for the off-center load torque generated by the traveling cable 1.

[0106] Specifically, refer to Figure 5 and Figure 6 The traction rope 6 is moved from the suspension point 4103 of the upper beam 41 towards the traveling cable 1 (in the positive x-axis and negative y-axis directions). The approximate moving distance can be calculated in advance based on relevant materials, or the specific moving distance of the traction rope 6 can be adjusted directly at the lowest point of the elevator.

[0107] Furthermore, the projection of the first suspension bracket 101 on the horizontal plane is located outside the projection plane of the car frame 4 on the horizontal plane.

[0108] When it involves elevators with multiple cars, such as Figure 7 When the two cars 5 shown are running simultaneously in the same hoistway, if the traveling cable 1 of the car 5 is located within the projection plane of the car 5 on the horizontal plane, the traveling cables 1 between the two cars 5 will interfere with each other and affect normal operation. Therefore, the traveling cable 1 should be located outside the horizontal projection plane of the car 5.

[0109] Furthermore, the elevator system capable of compensating for the weight of the traveling cable also includes a static balance block 7 located at the second end 4102 of the upper beam 41. The projection of the straight line containing the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 and the suspension point of the static balance block 7 on the horizontal plane passes through the projection of the center of gravity 4104 of the car frame 4 on the horizontal plane. The suspension point of the static balance block 7 and the suspension point 1011 of the traveling cable 1 on the first suspension bracket 101 are located on opposite sides of the center of gravity 4104 of the car frame 4. Here, the weight of the static balance block 7 is fixed, i.e., its gravity is fixed.

[0110] Furthermore, the static balance block 7 is installed at the second end 4102 of the upper beam 41 via the third suspension bracket 701.

[0111] Furthermore, assuming the elevator system is at its highest point, the force required to balance the traveling cable 1 is... Static balance block 7 is set to gravity. Thus, all other things being equal, the maximum value of the forces that need to be balanced is determined by... Reduce to

[0112] This embodiment, without adding any structure, generates a dynamically changing second torque on the center of gravity of the car frame by eccentrically setting the suspension point of the traction rope. This balances the dynamically changing first torque generated by the traveling cable on the center of gravity of the car frame, thereby eliminating the influence on the rolling guide shoe. It is low in cost and has significant effects.

[0113] This invention provides an elevator system that can compensate for the weight of the traveling cable, and simultaneously uses the asymmetrical arrangement of the compensation rope and the eccentric arrangement of the traction rope suspension point to balance the weight of the traveling cable.

[0114] The foregoing description of specific exemplary embodiments of the invention is for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed, and it will be apparent that many modifications and variations can be made in light of the foregoing teachings. The exemplary embodiments were chosen and described to explain certain principles of the invention and its practical application, thereby enabling those skilled in the art to make and utilize various exemplary embodiments of the invention and their different alternatives and modifications. The scope of the invention is intended to be defined by the appended claims and their equivalents.

Claims

1. An elevator system capable of compensating for the weight of the traveling cable, comprising: The car; The car frame includes an upper beam, a left side beam, a lower beam, and a right side beam. The middle part of the upper beam is used to connect the traction rope, and the lower beam is used to support the car. The traction rope, the bottom end of which is connected to the upper beam of the car frame; A traveling cable is suspended at the first end of the upper beam or the first end of the lower beam, and the traveling cable generates a first torque on the center of gravity of the car frame. The elevator system is characterized in that it further includes: A torque balancing device is used to generate a second torque on the center of gravity of the car frame, the second torque being equal in magnitude and opposite in direction to the first torque; The torque balancing device includes two compensating ropes. When the traveling cable is suspended at the first end of one of the upper beam and the lower beam, the two compensating ropes are respectively suspended at the first end and the second end of the other of the upper beam and the lower beam. The resultant force of the two compensating ropes generates a second torque on the center of gravity of the car frame that is equal in magnitude and opposite in direction to the first torque. The elevator system also includes two second suspension brackets. Each of the two compensating ropes is suspended from the first and second ends of the other of the upper and lower beams through one of the second suspension brackets. The two compensating ropes are arranged in an asymmetrical suspension configuration, so that the resultant force point of the two compensating ropes no longer coincides with the projection of the center of gravity of the car frame onto the horizontal plane, thereby generating the second torque.

2. The elevator system capable of compensating for the weight of the traveling cable according to claim 1, characterized in that, The elevator system also includes a first suspension bracket, through which the traveling cable is suspended from the first end of the upper beam or the first end of the lower beam.

3. The elevator system capable of compensating for the weight of the traveling cable according to claim 2, characterized in that, The projection of the suspension point of the traveling cable on the first suspension bracket onto the horizontal plane is located outside the projection plane of the car onto the horizontal plane.

4. The elevator system capable of compensating for the weight of the traveling cable according to claim 1, characterized in that, The torque balancing device includes two compensating ropes. When the traveling cable is suspended at the first end of the lower beam, the two compensating ropes are respectively suspended at the first and second ends of the upper beam. The resultant force of the two compensating ropes generates a second torque on the center of gravity of the car frame that is equal in magnitude and opposite in direction to the first torque.

5. The elevator system capable of compensating for the weight of the traveling cable according to claim 4, characterized in that, The elevator system also includes two second suspension brackets, and the two compensating ropes are each suspended from the first and second ends of the upper beam through one of the second suspension brackets.

6. The elevator system capable of compensating for the weight of the traveling cable according to claim 1, characterized in that, The torque balancing device is configured such that the projection of the suspension point of the traction rope on the upper beam of the car frame onto the horizontal plane does not coincide with the projection of the center of gravity of the car frame onto the horizontal plane, so that the traction rope generates a second torque on the center of gravity of the car frame that is equal in magnitude and opposite in direction to the first torque.

7. The elevator system capable of compensating for the weight of the traveling cable according to any one of claims 1-6, characterized in that, The elevator system also includes a static balance block, which is suspended at the second end of the upper or lower beam of the traveling cable suspension. The projection of the straight line where the suspension point of the traveling cable and the suspension point of the static balance block are located on the horizontal plane passes through the projection of the center of gravity of the car frame on the horizontal plane, and the suspension point of the static balance block and the suspension point of the traveling cable are respectively located on both sides of the center of gravity of the car frame.

Images