Variable-speed running mechanism matched with load

Abstract

The invention discloses a load-matched variable-speed running mechanism, which relates to the technical field of parking equipment and comprises a control device, a load detection device and a variable-speed driving device, the load detection device and the variable-speed driving device are electrically connected with the control device, and the load detection device is used for detecting the load state of a traction chain / cable. The variable-speed driving device is used for driving the traction end of the traction chain / cable to displace at a reasonable speed, the control device can control the variable-speed driving device to adjust the speed according to a load state signal detected by the load detection device, and the load detection device controls the variable-speed driving device to adjust the speed when detecting a no-load signal or an overweight signal in the displacement process of the traction chain / cable. And the control device controls the variable-speed driving device to stop running and sends out an alarm signal. The method is low in cost, high in efficiency and capable of avoiding the overweight load risk.

Description

Technical Field

[0001] The invention relates to the technical field of parking equipment, and in particular to a load-matching speed-changing operating mechanism. Background Art

[0002] At present, parking equipment has been widely used. Among them, two-layer lifting and transverse moving parking equipment and two-layer simple lifting parking equipment with single or multiple parking spaces account for more than 50% of the market share. Among them, two-layer lifting and transverse moving parking equipment driven by rear-mounted traction chain / cable, two-layer simple lifting parking equipment with multiple parking spaces, and single-parking space simple lifting parking equipment driven by central traction chain / cable, occupy a certain share in the market due to their relatively low production costs. However, the prior art has not taken substantial measures to avoid the risk of overload, and the prior art drives the lifting operation at a single speed, resulting in low efficiency (even an empty car plate can only be driven at a normal load speed).

[0003] To this end, how to solve the above-mentioned defects in the current technology of two-story lifting and transverse shifting parking equipment with rear-mounted traction chain / cable driven lifting, two-story simple lifting parking equipment with multiple parking spaces, and single-parking space simple lifting parking equipment with central traction chain / cable driven lifting in a low-cost manner has become an issue that urgently needs to be solved in the industry. Summary of the invention

[0004] The purpose of the present invention is to provide a load-matching variable speed operating mechanism to solve the problems existing in the above-mentioned prior art, with low cost and high efficiency, and capable of avoiding the risk of overload.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a speed-changing operation mechanism for matching loads, comprising a control device, a load detection device and a speed-changing drive device electrically connected to the control device; the load detection device is used to detect the load state of a traction chain / cable, and the configuration of the load detection device includes any one of the following three modes: Mode 1, the load detection device includes a deformation detection unit, and the deformation detection unit is used alone; Mode 2, the load detection device includes the deformation detection unit and a current detection unit, or the load detection device includes the deformation detection unit and a vehicle detection unit, and the deformation detection unit cooperates with the current detection unit and the vehicle detection unit. The load detection device comprises the deformation detection unit, the current detection unit and the vehicle detection unit, and the deformation detection unit is used in conjunction with the current detection unit and the vehicle detection unit at the same time; the variable speed drive device is used to drive the displacement of the traction end of the traction chain / cable; the control device can control the speed of the variable speed drive device according to the load status signal detected by the load detection device; when the load detection device detects a no-load signal or an overload signal during the displacement of the traction chain / cable, the control device controls the variable speed drive device to stop running and sends an alarm signal.

[0007] Preferably, the deformation detection unit includes an equipment frame, a first mounting seat, a first connecting module, a first compression module and a displacement detection module, the first mounting seat is installed on the equipment frame, and the first mounting seat is hollow inside, the first compression module is installed in the first mounting seat, the two ends of the first connecting module extend out through the two ends of the first mounting seat respectively, and one end of the first connecting module is used to connect the traction chain / rope, the first compression module is sleeved on the outer periphery of the first connecting module, and the first end of the first compression module faces the traction chain / rope and is close to the first mounting seat, the second end of the first compression module is constrained by the first connecting module, the displacement detection module includes a fixing part and a displacement part, the fixing part and the displacement part are respectively installed on the first connecting module and the first mounting seat, and the displacement detection module is used to detect the displacement information of the first connecting module generated as the vehicle plate load changes.

[0008] Preferably, the first connecting module includes an adjusting screw and a nut assembly, two ends of the adjusting screw extend out through two ends of the first mounting seat respectively, and the first end of the adjusting screw is used to connect the traction chain / cable, the second end of the adjusting screw is processed with an external thread on the outer periphery, the first compression module is sleeved on the outer periphery of the adjusting screw, the nut assembly includes a first nut and a second nut, the first nut and the second nut are arranged along the length direction of the adjusting screw, and the first nut and the second nut are both threadedly connected to the adjusting screw, and the first nut and the second nut can be locked with each other after being adjusted into place, so that the first nut and the second nut cannot produce relative rotation or displacement.

[0009] Preferably, the first compression module comprises a spring body, and the spring body comprises at least one butterfly spring, or the spring body comprises at least one cylindrical spring.

[0010] Preferably, the displacement detection module includes at least one detection element and at least one detection feature, wherein there is one detection element and when the detection element is installed on the first connecting module that constrains the first compression module, there are multiple detection features and the multiple detection features are all installed on the first mounting seat, and the multiple detection features are arranged in sequence along the length direction of the first mounting seat, and the multiple detection features respectively correspond to different load states of the traction chain / rope, or, there is one detection feature and when the detection feature is installed on the first connecting module that constrains the first compression module, there are multiple detection elements and when the multiple detection elements are arranged in sequence along the length direction of the first mounting seat, the multiple detection elements respectively correspond to different load states of the traction chain / rope.

[0011] Preferably, the detection element adopts the following structural methods alone or in combination: Method 1, mechanical action detection method, the detection element is a rocker switch, a touch switch, or a pressure switch, and the detection feature is a touch plate; Method 2, photoelectric signal detection method, the detection element is a photoelectric counter-beam detection element, and the detection feature is a shading plate; Method 3, electromagnetic signal detection method, the detection element is a proximity switch, and the detection feature is a magnetic plate.

[0012] Preferably, the current detection unit includes a detection circuit and a trigger switch, the detection circuit is used to detect the current of the main drive circuit in the variable speed drive device, and the trigger switch is set with a current threshold. When the detection circuit detects that the current of the main drive circuit reaches or exceeds the current threshold, the trigger switch sends a jump signal to the control device.

[0013] Preferably, the vehicle detection unit includes an object detection module, which is an ultrasonic detection device or a radar wave detection device, and the object detection module is arranged at the bottom of the vehicle board. The detection direction of the object detection module is the upper area of ​​the vehicle board, and it is used to detect whether there is a vehicle above the vehicle board, and send a corresponding switch signal to the control device.

[0014] Preferably, the load state of the traction chain / cable detected by the load detection device includes at least a no-load state, a vehicle plate load state, an overload state and a normal load state, and the operating state of the variable speed drive device includes at least a high-speed operating state, a low-speed operating state and an emergency stop operating state. When the load detection device detects that the traction chain / cable is in the no-load state in the initial operating stage and in the vehicle plate load state in the normal operating stage, the control device controls the variable speed drive device to be in the high-speed operating state. When the load detection device detects that the traction chain / cable is in the normal load state in the normal operating stage, the control device controls the variable speed drive device to be in the low-speed operating state. When the load detection device detects that the traction chain / cable is in the overload state in the normal operating stage, the control device controls the variable speed drive device to be in the emergency stop operating state.

[0015] Preferably, the speed-changing operation mechanism also includes a backup traction unit, which includes an equipment frame, a second mounting seat, a second connecting module and a second compression module. The second mounting seat is mounted on the equipment frame, and the interior of the second mounting seat is hollow. The second compression module is installed in the second mounting seat. Both ends of the second connecting module extend out through both ends of the second mounting seat respectively, and one end of the second connecting module is used to connect the backup chain / rope. The second compression module is sleeved on the outer periphery of the second connecting module, and the first end of the second compression module faces the backup chain / rope and is close to the second mounting seat. The second end of the second compression module is constrained by the second connecting module. The backup chain / rope has the same detour path as the traction chain / rope, and when the traction chain / rope is in a normal state, the backup chain / rope does not bear the load. When the traction chain / rope is broken, the backup chain / rope replaces the traction chain / rope to bear the load.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The load-matching variable speed operation mechanism provided by the present invention comprises a control device, a load detection device and a variable speed drive device electrically connected to the control device, wherein the load detection device is used to detect the load state of the traction chain / cable, and the variable speed drive device is used to drive the traction end of the traction chain / cable to move at a reasonable speed, and the control device can control the speed of the variable speed drive device according to the load state signal detected by the load detection device. The relevant technical effects include:

[0018] 1. By real-time detection of the load status of the traction chain / cable and real-time automatic adjustment of the driving speed of the variable speed drive device, the operating efficiency can be effectively improved;

[0019] 2. By real-time detection of the load status of the traction chain / cable, the risk of overload can be effectively avoided;

[0020] 3. When the load detection device detects a no-load signal during the displacement of the traction chain / cable, it indicates that the traction chain / cable is broken. The control device controls the variable speed drive device to stop running and sends out an alarm signal, which can reduce the risk of accidents caused by the traction chain / cable breakage, thereby reducing the risk of use;

[0021] 4. The load detection device can be formed by using a deformation detection unit alone, or using a deformation detection unit in combination with a current detection unit or a vehicle detection unit, or using a deformation detection unit in combination with a current detection unit and a vehicle detection unit. The setting is flexible, and the overall structure is simple and the cost is low.

[0022] 5. The backup traction unit can avoid the occurrence of vehicle overturning accidents caused by the breakage of the traction chain / cable.

[0023] Therefore, the present invention can effectively improve the competitiveness of products and promote the healthy development of two-story lifting and transverse shifting parking equipment with rear-mounted traction chain / cable driven lifting, two-story simple lifting parking equipment with multiple parking spaces, and single-parking space simple lifting parking equipment with central traction chain / cable driven lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figures 1 to 8 In the load matching speed-changing operation mechanism provided by the present invention, the load detection device adopts a deformation detection unit alone, and the relevant schematic diagram in the first embodiment in which the spring body is a cylindrical spring is specifically as follows:

[0026] Figure 1 It is a schematic diagram of the first embodiment when the traction chain / cable is in a no-load state;

[0027] Figure 2 It is a schematic diagram of the first embodiment when the traction chain / cable is in a vehicle plate load state;

[0028] Figure 3 It is a schematic diagram of the first embodiment when the traction chain / cable is in a normal load state;

[0029] Figure 4 This is a schematic diagram of the first embodiment when the traction chain / cable is in an overloaded state;

[0030] Figure 5 This is a diagram showing the position correspondence between a detection feature and a plurality of detection elements when the traction chain / cable is in a no-load state in Embodiment 1;

[0031] Figure 6 This is a diagram showing the position correspondence between a detection feature and a plurality of detection elements when the load borne by the traction chain / cable is equal to the vehicle plate load in Example 1;

[0032] Figure 7 This is a diagram showing the position correspondence between a detection feature and a plurality of detection elements when the load borne by the traction chain / cable is greater than the vehicle plate load and less than the overload load in the first embodiment;

[0033] Figure 8 This is a diagram showing the position correspondence between a detection feature and a plurality of detection elements when the traction chain / cable is in an overload state in Example 1;

[0034] In the figure: 1-first mounting seat, 2-cylindrical spring, 3-fixed seat, 4-end cover, 5-washer, 6-first nut, 7-second nut, 8-adjusting screw, 9-equipment frame, 10-overload detection element, 11-vehicle plate load detection element, 12-no load detection element, 13-detection feature. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The purpose of the present invention is to provide a load-matching variable speed operating mechanism to solve the problems existing in the prior art, with low cost and high efficiency, and capable of avoiding the risk of overload.

[0037] As mentioned above, the present invention provides a load-matching variable-speed operation mechanism, which can be applied to a two-story lifting and transverse shifting parking device that adopts a rear-mounted traction chain / cable to drive lifting, a two-story simple lifting parking device with multiple parking spaces, and a single-parking space simple lifting parking device that adopts a central traction chain / cable to drive lifting. The load-matching variable-speed operation mechanism includes a control device, and a load detection device and a variable-speed drive device that are electrically connected to the control device. The load detection device signal is connected to the control device. The load detection device directly or indirectly detects the load state currently borne by the traction chain / cable, and the load state at least includes a no-load state, a vehicle plate load state, an overload load state, and a normal load state. The variable-speed drive device is used to drive the traction end of the traction chain / cable to move. The use of the load detection device in conjunction with the variable-speed drive device can solve the low efficiency defect existing in the current technology. The load state information detected by the load detection device It can be sent to the control device, so that the control device can control the speed regulation of the variable speed drive device according to the load status signal detected by the load detection device. By real-time detection of the load status of the traction chain / cable and real-time automatic adjustment of the driving speed of the variable speed drive device, the risk of overload can be effectively avoided. When the load detection device detects a no-load signal during the displacement of the traction chain / cable, it indicates that the traction chain / cable is broken. This is because in the process of the vehicle plate being driven and displaced by the traction chain / cable, except for the no-load signal at the beginning and when it reaches the static position, there will be no no-load signal in the rest time period unless the traction chain / cable is broken. Therefore, when the load detection device detects a no-load signal during the displacement of the traction chain / cable, the control device controls the variable speed drive device to stop running and send out an alarm signal, which can avoid the vehicle plate overturning accident caused by the traction chain / cable break.

[0038] Specifically, the variable speed drive device is a dual-speed motor reducer, or a variable frequency drive motor reducer with at least two operating curves of low-speed operation and high-speed operation. When the variable speed drive device is in operation, it can drive the traction end of the traction chain / cable to move, thereby driving the vehicle plate to rise or fall; the variable speed drive device is sent a switch jump signal by the control device to be in a high-speed operation state, a low-speed operation state or an emergency stop operation state, wherein the high-speed operation state corresponds to the no-load state in the initial operation stage of the traction chain / cable and the vehicle plate load state in the normal operation stage of the traction chain / cable, the low-speed operation state corresponds to the normal load state in the normal operation stage of the traction chain / cable, and the emergency stop operation state corresponds to the initial operation stage of the traction chain / cable and the overloaded load state in the normal operation stage.

[0039] For the two-story lifting and transverse shifting parking equipment driven by the rear traction chain / cable, the two-story simple lifting parking equipment with multiple parking spaces, and the single-parking space simple lifting parking equipment driven by the central traction chain / cable, the "chain / cable" in the traction chain / cable refers to a chain or a steel cable, and "traction" means that one end of the chain / cable is fastened to the equipment frame 9 of the load detection device, and the other end is wound downward from one side of the vehicle plate and upward from the other side of the vehicle plate through the bottom of the vehicle plate, and finally connected to the output end of the variable speed drive device, and driven by the variable speed drive device to move, thereby raising or lowering the vehicle plate; when the traction chain / cable is a chain, the output end of the variable speed drive device is a sprocket; when the traction chain / cable is a steel cable, the output end of the variable speed drive device is a steel cable drum.

[0040] The load detection device includes a deformation detection unit, a current detection unit, and a vehicle detection unit.

[0041] Corresponding to the operating environment involved in the present invention, since the vehicle plate is driven to move up and down by the traction chain / cable, the vehicle plate load is directly borne by the traction chain / cable. When the end of the traction chain / cable is provided with a first compression module including a spring body, and one end of the first compression module is fixedly arranged on the equipment frame 9, the no-load state, vehicle plate load state, and overload state currently borne by the traction chain / cable can be clearly distinguished by the deformation displacement of the other end of the first compression module by the deformation detection unit arranged on the first compression module. Therefore, the speed-changing operation mechanism for matching loads provided by the present invention can realize all the functions required by the load detection device by using the deformation detection unit alone.

[0042] Corresponding to the operating environment involved in the present invention, since the vehicle plate is driven to lift and displace by the lifting motor, the driving circuit of the lifting motor is called the main driving circuit, and the voltage of the main circuit can be considered to be constant. The size of the vehicle plate load is proportional to the current size of the main driving circuit. The no-load state, vehicle plate load state, and overload state currently borne by the traction chain / cable can be clearly distinguished by detecting the current size of the main driving circuit. Specifically: a set of current detection units is correspondingly set for the main driving circuit of each variable speed drive device, which is used to indirectly detect the current load state of the traction chain / cable, and the current detection unit includes a detection circuit and a trigger switch. The detection circuit is used to detect the current current of the main driving circuit; the trigger switch is set with a current threshold value sent by the trigger switch signal. When the current detected by the detection circuit reaches or exceeds the threshold, the trigger switch sends a jump signal to the control device. The trigger switch includes a no-load trigger switch, a vehicle plate load trigger switch, and an overload trigger switch (which can be set according to actual needs). The threshold of the no-load trigger switch corresponds to the load state of the traction chain / cable currently being no-loaded; the threshold of the vehicle plate load trigger switch corresponds to the load state of the traction chain / cable currently being vehicle plate load; the threshold of the overload trigger switch corresponds to the load state of the traction chain / cable currently being overloaded. Therefore, the load-matching variable speed operation mechanism provided by the present invention can also use a deformation detection unit in conjunction with a current detection unit to realize all the functions required by the load detection device.

[0043] Corresponding to the operating environment involved in the present invention, since the vehicle parked on the vehicle plate can be detected by the vehicle detection unit, a corresponding switch signal is sent to the control device to indirectly detect whether the traction chain / cable currently has a vehicle load state. Therefore, the load-matching speed-changing operation mechanism provided by the present invention can also use a deformation detection unit in conjunction with a vehicle detection unit to realize all the functions required by the load detection device.

[0044] Obviously, the load-matching speed-changing operating mechanism provided by the present invention can also use a deformation detection unit in conjunction with a current detection unit and a vehicle detection unit to realize all the functions required by the load detection device.

[0045] For the load state of the traction chain / cable detected by the load detection device:

[0046] The no-load state means that the traction chain / cable has no other load except its own weight. The occasions include that the vehicle plate is stationary at the ground position and supported by the ground, or the vehicle plate is stationary at the upper position and supported by the anti-fall unit, or the traction chain / cable breaks when the vehicle plate is rising or falling. Obviously, the no-load state corresponds to the spring body of the deformation detection unit being in the maximum extension state.

[0047] The vehicle plate load state refers to the traction chain / cable only having the vehicle plate load, which occurs when there is no load on the vehicle plate and the load is only the vehicle plate mass; obviously, the vehicle plate load state corresponds to the spring body of the deformation detection unit being in the preset vehicle plate load deformation position, the current detection unit detecting the threshold current matching the preset vehicle plate load, and the vehicle detection unit detecting the state of an object;

[0048] The overload state means that the load borne by the traction chain / cable exceeds the rated range, which occurs when the mass of the load on the vehicle plate is greater than the preset rated mass of the equipment, or the tension borne by the traction chain / cable is greater than the preset rated tension of the equipment due to other reasons; obviously, the overload state corresponds to the spring body of the deformation detection unit being in the preset overload deformation position, and corresponds to the threshold current matched with the preset overload detected by the current detection unit;

[0049] The normal load state means that the load borne by the towing chain / cable is within the rated range. The occasions when this occurs include that the mass of the load above the vehicle plate is less than or equal to the rated mass preset by the equipment, and it is obvious that the tension borne by the towing chain / cable is less than or equal to the rated tension preset by the equipment. The normal load state corresponds to the spring body of the deformation detection unit being in any position between the preset vehicle plate load deformation position and the preset overload deformation position, and corresponds to the current detection unit detecting any value between the threshold current matching the preset vehicle plate load and the threshold current matching the preset overload.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Embodiment 1

[0052] like Figure 1-Figure 8 As shown, this embodiment provides a speed-changing operation mechanism for matching loads, wherein the load detection device alone uses a deformation detection unit and the spring body therein is a cylindrical spring 2, the detection element of the displacement detection module alone uses a photoelectric detection element, and the detection feature 13 is a light shielding plate. The advantages of this embodiment are: there is only one load detection means, and the structure and control are relatively simple.

[0053] In the present embodiment, each traction chain / cable is respectively provided with a set of load detection devices, which are used to directly detect the current load state of the traction chain / cable and are arranged at the end position of the traction chain / cable, and specifically include an equipment frame 9, a first mounting seat 1, a first compression module, a first connection module and a displacement detection module. The first compression module of the present embodiment is composed of a cylindrical spring 2, a fixing seat 3, and an end cover 4; the first connection module is composed of a washer 5, a first nut 6, a second nut 7, and an adjusting screw 8; the displacement detection module includes an overload detection element 10, a vehicle plate load detection element 11, a no-load detection element 12 and a detection feature 13; it can be seen from the figure that the first mounting seat 1 is firmly installed on the equipment frame 9, and the first mounting seat 1 is hollow inside, one end of the internal cavity of the first mounting seat 1 is a closed end, and the closed end is provided with a hole that can be freely penetrated by the end of the traction chain / cable The first compression module is installed in the first mounting seat 1, and the two ends of the adjusting screw 8 of the first connecting module extend out through the two ends of the first mounting seat 1 respectively, and one end of the adjusting screw 8 (the left end in the figure) is used to connect the traction chain / cable (not shown in the figure), the first compression module is located in the first mounting seat 1, and the cylindrical spring 2, the fixing seat 3, and the end cover 4 of the first compression module are all sleeved on the outer periphery of the adjusting screw 8 of the first connecting module, and the first end of the first compression module (the left end of the fixing seat 3 in the figure) faces the traction chain / cable and is close to the first mounting seat 1, and the second end of the first compression module (the right end of the end cover 4 in the figure) is constrained by the first connecting module, and the displacement detection module includes a fixing part and a displacement part, which are respectively installed on the first connecting module and the first mounting seat 1, and the displacement detection module is used to detect the displacement information generated by the first connecting module as the vehicle plate load changes.

[0054] The coordinated use of the fixing seat 3, the end cover 4 and the cylindrical spring 2 is a common practice, which can prevent the cylindrical spring 2 from deforming beyond stability and enhance the pressure resistance of the two ends of the cylindrical spring 2.

[0055] It can be seen from the figure that the first nut 6 and the second nut 7 of the first connecting module are threadedly connected to the outer periphery of the adjusting screw 8, and are arranged close to the end cover 4 of the first compression module, and the end cover 4 of the first compression module is limited by the washer 5. The main function of the washer 5 is to improve the contact state between the first nut 6 and the end cover 4. The adjusting screw 8 can be adjusted in length by the first nut 6 and the second nut 7. The first nut 6 and the second nut 7 are locked with each other after the position is adjusted, so that the first nut 6 and the second nut 7 cannot produce relative rotation or displacement.

[0056] The displacement detection module of this embodiment adopts a detection feature 13 and multiple detection elements (respectively, an overload detection element 10, a vehicle plate load detection element 11, and a no-load detection element 12). The detection element is a photoelectric detection element, and the detection feature 13 is a shading plate.

[0057] As can be seen in the figure, the shape of the detection feature 13 matches the detection component of the detection element, which can trigger the detection element to send an arrival signal and a departure signal. The multiple detection features 13 at least include a no-load detection feature, a vehicle plate load detection feature, and an overload detection feature. Among them, the setting position of the no-load detection feature corresponds to the position of the detection component of the detection element when the spring body is in the maximum extension state; the setting position of the vehicle plate load detection feature corresponds to the position of the detection component of the detection element when the spring body is in a compressed state when there is only a vehicle plate but no vehicle; the setting position of the overload detection feature corresponds to the position of the detection component of the detection element when the spring body is in a compressed state when there is an overload.

[0058] The inspection method of this embodiment (i.e., there are multiple detection elements) is:

[0059] Assume that there is no vehicle on the vehicle plate and it is stationary at the ground level: since the vehicle plate is supported by the ground, the current spring body is in the maximum extension state; at this time, the position of the detection feature 13 corresponds to the position of the detection component of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as no-load; when the traction chain / rope is driven by the speed change drive device to cause the vehicle plate to move upward, the vehicle plate load causes the cylindrical spring 2 to be compressed, and the detection feature 13 leaves the corresponding position of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as starting to carry load; since there is no vehicle on the vehicle plate, the position of the detection feature 13 always corresponds to the position of the vehicle plate load detection element 11, and the signal output by the vehicle plate load detection element 11 is recognized by the control device as only the vehicle plate, so the output signal causes the speed change drive device to run at high speed.

[0060] When there is no vehicle on the deck and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0061] Assume that there is a vehicle with a mass less than or equal to the rated mass on the vehicle plate, and it is stationary at the ground level: since the vehicle plate carrying the vehicle is supported by the ground, the current spring body is in the maximum extension state; at this time, the position of the detection feature 13 corresponds to the position of the detection component of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as no-load; when the traction chain / cable is driven by the speed change drive device to cause the vehicle plate to move upward, the vehicle and vehicle plate loads cause the cylindrical spring 2 to be compressed, and the detection feature 13 leaves the corresponding position of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as starting to carry load; since there is a vehicle on the vehicle plate, the position of the detection feature 13 reaches and exceeds the position of the detection component of the vehicle plate load detection element 11, but does not reach the position corresponding to the detection component of the overload detection element 10, and the signal output by the vehicle plate load detection element 11 is recognized by the control device as a vehicle plate with normal load, so the output signal causes the speed change drive device to run at a low speed.

[0062] If there is a vehicle on the deck with a mass less than or equal to the rated mass and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0063] When there is a vehicle on the vehicle plate with a mass greater than the rated mass (i.e. overloaded), the traction chain / cable is driven by the speed change drive device to make the vehicle plate move up or down: the overloaded vehicle plate causes the cylindrical spring 2 to be compressed, and the position of the detection feature 13 will successively pass the no-load detection element 12 and the vehicle plate load detection element 11, and finally reach the corresponding position of the detection component of the overload detection element 10. The signal output by the overload detection element 10 is identified as overload by the control device, so the output signal causes the speed change drive device to stop running and alarm.

[0064] The following further describes the load detection device provided in this embodiment that solely uses a deformation detection unit.

[0065] like Figure 1 As shown, the current traction chain / cable is in a no-load state. The tension on the traction chain / cable on the left side of the figure is the self-weight tension F0 of the traction chain / cable. At this time, the cylindrical spring 2 is in the maximum state of free extension, and the right end of the adjusting screw 8 is in the no-load position A0.

[0066] like Figure 2 As shown, the current towing chain / cable is in the vehicle plate load state, the tension applied to the towing chain / cable on the left side of the figure is the vehicle plate load tension F1, the cylindrical spring 2 is in the initial compression state, and the right end of the adjusting screw 8 is in the vehicle plate load position A1; the stroke of the adjusting screw 8 shown in the figure is the vehicle plate load stroke a1, which is also the stroke of the end cover 4.

[0067] like Figure 3As shown, the current traction chain / cable is in a normal load state, the tension applied to the traction chain / cable on the left side of the figure is the normal load tension F2, the cylindrical spring 2 is further compressed on the basis of the initial compression state, and the right end of the adjusting screw 8 is in the normal load position A2; the stroke of the adjusting screw 8 in the figure is the normal load stroke a2, which is also the stroke of the end cover 4.

[0068] like Figure 4 As shown, the current traction chain / cable is in an overload state, the tension applied to the traction chain / cable on the left side of the figure is an overload tension F3, the cylindrical spring 2 reaches the maximum compression state, and the right end of the adjusting screw 8 is in the overload position A3; the stroke of the adjusting screw 8 is the overload stroke a3, which is also the stroke of the end cover 4.

[0069] It is well known to those skilled in the art that the usual vehicle plate mass is about 500kg; the rated mass of the vehicle is related to the type of vehicle that the parking equipment allows to park, which is generally 1700kgga, 2000kg or 2300kg, which is about three to four times the vehicle plate mass; and the standard for overload is usually 120% of the rated mass. In other words, as long as the cylindrical spring 2 with appropriate stiffness and compression rate is selected, the travel of the end cover 4 from no load to vehicle plate load has enough distance to arrange the detection element or detection feature 13, so as to distinguish between no load and vehicle plate load; similarly, the travel of the end cover 4 from vehicle plate load to overload also has enough distance to arrange the detection element or detection feature 13, so as to distinguish between vehicle plate load and overload; and the load between vehicle plate load and overload should be regarded as normal load.

[0070] like Figure 5-Figure 8 As shown, this embodiment takes the setting of multiple detection elements and a detection feature 13 as an example, and the overload detection element 10, the vehicle plate load detection element 11 and the no-load detection element 12 are respectively installed on the first mounting seat 1 from left to right, and a detection feature 13 is installed on the end cover 4.

[0071] like Figure 5 As shown, the current traction chain / rope is in a no-load state, and the cylindrical spring 2 is in the maximum state of free extension; at this time, the detection feature 13 blocks the optical channel of the no-load detection element 12, and the no-load detection element 12 sends a jump signal, indicating that it is currently in a no-load state.

[0072] like Figure 6As shown, the load borne by the traction chain / cable is just equal to the vehicle plate load, and the cylindrical spring 2 is compressed, so that the detection feature 13 blocks the optical channel of the vehicle plate load detection element 11, and the vehicle plate load detection element 11 sends a jump signal, indicating that it is currently in a vehicle plate load state; at this time, the optical channel of the no-load detection element 12 is connected, and the no-load detection element 12 sends a jump signal, indicating that it has left the no-load state.

[0073] like Figure 7 As shown, the load borne by the traction chain / cable is greater than the vehicle plate load but less than the overload detection, and the cylindrical spring 2 is further compressed, causing the detection feature 13 to leave the corresponding position of the vehicle plate load detection element 11, and the optical channel of the vehicle plate load detection element 11 is turned on, and the vehicle plate load detection element 11 sends a jump signal, indicating that the vehicle plate load state has been left; because the optical channel of the overload detection element 10 is turned on at this time, it can be determined that it is currently in a normal load state.

[0074] like Figure 8 As shown, the current load of the traction chain / cable reaches the overload, and the cylindrical spring 2 is in the maximum compression state; at this time, the detection feature 13 blocks the optical channel of the overload detection element 10, and the overload detection element 10 sends a jump signal, indicating that it is currently in an overload state.

[0075] The spring body of this embodiment is composed of a cylindrical compression spring. In other embodiments, the spring body can be composed of a butterfly spring or a plurality of cylindrical compression springs with different compression ratios. In fact, if the cylindrical spring 2 of this embodiment is changed to two cylindrical compression springs with different compression ratios, and the compression deformation rate of the cylindrical compression spring located at the right end of the figure is relatively large, the installation distance between the vehicle plate load detection element 11 and the no-load detection element 12 will be close to the installation distance between the vehicle plate load detection element 11 and the overload detection element 10, so that the relevant detection accuracy can be further improved.

[0076] Embodiment 2

[0077] This embodiment adopts a structure similar to that of the first embodiment, but adopts a detection element and a plurality of detection feature members 13 instead, which is equivalent to the structure of the first embodiment. Figures 5 to 8 The positions of reference numerals "10", "11" and "12" are respectively equipped with overload detection feature, vehicle plate load detection feature and no-load detection feature, and the position of reference numeral "13" is equipped with a detection element. The advantages of this embodiment are: there is only one load detection method, and the structure and control are relatively simple. The corresponding inspection method (refer to the drawings of embodiment 1) can be described as:

[0078] Assume that there is no vehicle on the vehicle plate and it is stationary at the ground level: since the vehicle plate is supported by the ground, the current spring body is in the maximum extension state. At this time, the position of the detection element corresponds to the position of the no-load detection feature, and the signal output by the detection element is recognized by the control device as no-load; when the traction chain / cable is driven by the variable speed drive device to cause the vehicle plate to move upward, the vehicle plate load causes the cylindrical spring 2 to be compressed, and the detection component of the detection element leaves the previous position corresponding to the no-load detection feature, and the signal output by the detection element is recognized by the control device as starting to carry load; since there is no vehicle on the vehicle plate, the position of the detection element always corresponds to the position of the vehicle plate load detection feature, and the signal output by the detection element is recognized by the control device as only the vehicle plate, so the output signal causes the variable speed drive device to run at high speed.

[0079] When there is no vehicle on the deck and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0080] Assume that there is a vehicle on the vehicle plate with a mass less than or equal to the rated mass, and it is stationary at the ground level: since the vehicle plate carrying the vehicle is supported by the ground, the current cylindrical spring 2 is in the maximum extension state. At this time, the position of the detection element corresponds to the position of the no-load detection feature, and the signal output by the detection element is recognized by the control device as no-load; when the traction chain / rope is driven by the variable speed drive device and the vehicle plate carrying the vehicle is displaced upward, the load of the vehicle and the vehicle plate causes the cylindrical spring 2 to be compressed, and the detection component of the detection element leaves the previous position corresponding to the no-load detection feature, and the signal output by the detection element is recognized by the control device as starting to carry load; since there is a vehicle on the vehicle plate, the position of the detection element reaches and exceeds the position of the vehicle plate load detection feature, but does not reach the position corresponding to the overload detection feature, and the signal output by the detection element is recognized by the control device as a vehicle plate with normal load, so the output signal causes the variable speed drive device to run at a low speed.

[0081] If there is a vehicle on the deck with a mass less than or equal to the rated mass and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0082] When there is a vehicle with a mass greater than the rated mass (i.e. overload) on the vehicle plate, the traction chain / cable is driven by the speed change drive device to make the overloaded vehicle plate move up or down: the overloaded vehicle plate causes the cylindrical spring 2 to be compressed, and the position of the detection element will successively pass the no-load detection feature part and the vehicle plate load detection feature part, and finally reach the corresponding position of the overload detection feature part. The signal output by the detection element is identified as overload by the control device, so the output signal causes the speed change drive device to stop running and alarm.

[0083] Embodiment 3

[0084] This embodiment adopts the method of combining the deformation detection unit with the current detection unit, wherein the deformation detection unit is only responsible for no-load detection and vehicle plate load detection (i.e., the deformation detection unit of the first embodiment is only responsible for no-load detection and vehicle plate load detection). Figures 5 to 8 The overload detection element 10 shown is cancelled), and the current detection unit is responsible for detecting the overload (that is, only the overload trigger switch and the threshold of the overload trigger switch need to be set).

[0085] The advantages of this embodiment are: 1. When the load borne by the traction chain / cable is greater than the load on the vehicle plate, the cylindrical spring 2 is completely compressed and is in a stable state, which is beneficial to the rigidity of the equipment and the stability of its operation; 2. The overload detection of the current detection unit is also an overload protection measure that must be set up for the equipment, which can give full play to the effectiveness of related facilities and save costs.

[0086] The investigation method corresponding to this embodiment (refer to the drawings of the first embodiment) can be described as follows:

[0087] Assume that there is no vehicle on the vehicle plate and it is stationary at the ground level: since the vehicle plate is supported by the ground, the current spring body is in the maximum extension state. At this time, the position of the detection feature 13 corresponds to the position of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as no-load; when the traction chain / cable is driven by the variable speed drive device to cause the vehicle plate to move upward, the vehicle plate load causes the cylindrical spring 2 to be compressed, and the detection feature 13 leaves the previous corresponding position with the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as starting to carry load; since there is no vehicle on the vehicle plate, the position of the detection feature 13 always corresponds to the position of the vehicle plate load detection element 11, and the signal output by the vehicle plate load detection element 11 is recognized by the control device as only the vehicle plate, so the output signal causes the variable speed drive device to run at high speed.

[0088] When there is no vehicle on the deck and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0089] Assume that there is a vehicle on the vehicle plate with a mass less than or equal to the rated mass, and it is stationary at the ground level: since the vehicle plate carrying the vehicle is supported by the ground, the current cylindrical spring 2 is in the maximum extension state. At this time, the position of the detection feature 13 corresponds to the position of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as no-load; when the traction chain / cable is driven by the speed change drive device and causes the vehicle plate carrying the vehicle to move upward, the load of the vehicle and the vehicle plate causes the cylindrical spring 2 to be compressed, and the detection feature 13 leaves the previous position corresponding to the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as starting to carry load; since there is a vehicle on the vehicle plate, the position of the detection feature 13 reaches and exceeds the position of the vehicle plate load detection element 11. As long as the current detection unit does not send an overload signal, it is recognized as a vehicle plate with normal load, and the output signal causes the speed change drive device to run at a low speed.

[0090] If there is a vehicle on the deck with a mass less than or equal to the rated mass and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0091] When there is a vehicle on the vehicle plate with a mass greater than the rated mass (i.e. overload), the traction chain / cable is driven by the variable speed drive device to make the overloaded vehicle plate move up or down: the current detection unit sends an overload signal, the control device identifies it as overload, and then outputs a signal to stop the variable speed drive device and alarm.

[0092] Embodiment 4

[0093] This embodiment adopts the method of using a deformation detection unit in conjunction with a current detection unit and a vehicle detection unit, wherein the deformation detection unit is only responsible for no-load detection (i.e., the deformation detection unit of the first embodiment is only responsible for no-load detection). Figures 5 to 8 The overload detection element 10 and the vehicle plate load detection element 11 shown are both cancelled), the current detection unit is responsible for detecting the overload (that is, only the overload trigger switch and the threshold of the overload trigger switch need to be set), and the vehicle detection unit is responsible for vehicle plate load detection.

[0094] The advantages of this embodiment are: 1. Once the traction chain / cable is under load, the cylindrical spring 2 is completely compressed and in a stable state, which is beneficial to the rigidity of the equipment and the stability of its operation; 2. The overload detection of the current detection unit is also an overload protection measure that must be set up for the equipment, which can give full play to the effectiveness of related facilities and save costs; 3. The vehicle detection unit is responsible for the vehicle plate load detection, which is more intuitive and convenient.

[0095] The investigation method corresponding to this embodiment (refer to the drawings of the first embodiment) can be described as follows:

[0096] Assume that there is no vehicle on the vehicle plate and it is stationary at the ground level: since the vehicle plate is supported by the ground, the current spring body is in the maximum extension state. At this time, the position of the detection feature 13 corresponds to the position of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as no-load; when the traction chain / cable is driven by the variable speed drive device to cause the vehicle plate to move upward, the vehicle plate load causes the cylindrical spring 2 to be compressed, and the detection feature 13 leaves the previous corresponding position with the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as starting to carry load; since there is no vehicle on the vehicle plate, the position of the detection feature 13 always corresponds to the position of the vehicle plate load detection element 11, and the signal output by the vehicle plate load detection element 11 is recognized by the control device as only the vehicle plate, so the output signal causes the variable speed drive device to run at high speed.

[0097] When there is no vehicle on the deck and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0098] Assume that there is a vehicle on the vehicle plate with a mass less than or equal to the rated mass, and it is stationary at the ground level: since the vehicle plate carrying the vehicle is supported by the ground, the current cylindrical spring 2 is in the maximum extension state. At this time, the position of the detection feature 13 corresponds to the position of the no-load detection element 12, and the signal output by the no-load detection element 12 is recognized by the control device as no-load; when the traction chain / cable is driven by the speed change drive device and the vehicle plate carrying the vehicle is caused to move upward, the load of the vehicle and the vehicle plate causes the cylindrical spring 2 to be compressed, and the detection feature 13 leaves the position corresponding to the no-load detection element 12 before, and the signal output by the no-load detection element 12 is recognized by the control device as starting to carry load; since the vehicle detection unit detects the presence of a vehicle, as long as the current detection unit does not send an overload signal, the control device will recognize it as a vehicle plate with normal load, and then output a signal to make the speed change drive device run at a low speed.

[0099] If there is a vehicle on the deck with a mass less than or equal to the rated mass and it is stationary at the upper level, the process of descending to the ground level is similar to the above.

[0100] When there is a vehicle on the vehicle plate with a mass greater than the rated mass (i.e. overload), the traction chain / cable is driven by the variable speed drive device to make the overloaded vehicle plate move up or down: the current detection unit sends an overload signal, the control device identifies it as overload, and then outputs a signal to stop the variable speed drive device and alarm.

[0101] The backup traction unit is further described below. The backup traction unit is used to further increase the operating safety of the load-matching variable speed operating mechanism provided by the present invention.

[0102] From the foregoing, it can be known that the backup traction unit includes an equipment frame 9, a second mounting seat, a second connecting module and a second compression module. The second mounting seat is mounted on the equipment frame 9, and the interior of the second mounting seat is hollow. The second compression module is installed in the second mounting seat. The two ends of the second connecting module extend out through the two ends of the second mounting seat respectively, and one end of the second connecting module is used to connect the backup chain / rope. The second compression module is sleeved on the outer periphery of the second connecting module, and the first end of the second compression module faces the backup chain / rope and is close to the second mounting seat, and the second end is constrained by the second connecting module. The backup chain / rope has the same detour path as the traction chain / rope, and when the traction chain / rope is in a normal state, the backup chain / rope does not bear the load. When the traction chain / rope is broken, the backup chain / rope replaces the traction chain / rope to bear the load. In order to easily realize the above functions, the backup chain / cable and the traction chain / cable must run synchronously, so the backup chain / cable should adopt the same type and parameters as the traction chain / cable, and the total length should be greater than the total length of the traction chain / cable, so that the backup chain / cable is in a relaxed state when the traction chain / cable is in a normal state.

[0103] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A load-matching variable speed operating mechanism, characterized in that: The invention comprises a control device, a load detection device and a variable speed drive device electrically connected to the control device; the load detection device is used to detect the load state of the traction chain / cable, and the structure of the load detection device includes any one of the following three methods: method 1, the load detection device includes a deformation detection unit, and the deformation detection unit is used alone; method 2, the load detection device includes the deformation detection unit and a current detection unit, or the load detection device includes the deformation detection unit and a vehicle detection unit, and the deformation detection unit cooperates with any one of the current detection unit and the vehicle detection unit. Use; Mode three, the load detection device includes the deformation detection unit, the current detection unit and the vehicle detection unit, and the deformation detection unit is used in conjunction with the current detection unit and the vehicle detection unit; the variable speed drive device is used to drive the displacement of the traction end of the traction chain / cable; the control device can control the speed of the variable speed drive device according to the load status signal detected by the load detection device; when the load detection device detects a no-load signal or an overload signal during the displacement of the traction chain / cable, the control device controls the variable speed drive device to stop running and send out an alarm signal.

2. The load-matching variable speed operation mechanism according to claim 1, characterized in that: The deformation detection unit includes an equipment frame, a first mounting seat, a first connecting module, a first compression module and a displacement detection module. The first mounting seat is installed on the equipment frame, and the first mounting seat is hollow inside. The first compression module is installed in the first mounting seat. The two ends of the first connecting module extend out through the two ends of the first mounting seat respectively, and one end of the first connecting module is used to connect the traction chain / rope. The first compression module is sleeved on the outer periphery of the first connecting module, and the first end of the first compression module faces the traction chain / rope and is close to the first mounting seat. The second end of the first compression module is constrained by the first connecting module. The displacement detection module includes a fixing part and a displacement part. The fixing part and the displacement part are respectively installed on the first connecting module and the first mounting seat, and the displacement detection module is used to detect the displacement information generated by the first connecting module as the vehicle plate load changes.

3. The load-matching variable speed running mechanism according to claim 2, characterized in that: The first connecting module includes an adjusting screw and a nut assembly, two ends of the adjusting screw extend out through two ends of the first mounting seat respectively, and the first end of the adjusting screw is used to connect the traction chain / cable, and the outer periphery of the second end of the adjusting screw is processed with an external thread, the first compression module is sleeved on the outer periphery of the adjusting screw, and the nut assembly includes a first nut and a second nut, the first nut and the second nut are arranged along the length direction of the adjusting screw, and the first nut and the second nut are both threadedly connected to the adjusting screw, and the first nut and the second nut can be locked with each other after being adjusted into place, so that the first nut and the second nut cannot produce relative rotation or displacement.

4. The load-matching variable speed operation mechanism according to claim 2, characterized in that: The first compression module includes a spring body, and the spring body includes at least one butterfly spring, or the spring body includes at least one cylindrical spring.

5. The load-matching variable speed operation mechanism according to claim 2, characterized in that: The displacement detection module includes at least one detection element and at least one detection feature. The detection element is one and when the detection element is installed on the first connecting module that constrains the first compression module, the detection features are multiple and all of the detection features are installed on the first mounting seat, and the multiple detection features are arranged in sequence along the length direction of the first mounting seat, and the multiple detection features correspond to different load states of the traction chain / rope, or the detection feature is one and when the detection feature is installed on the first connecting module that constrains the first compression module, the detection elements are multiple and when the multiple detection elements are arranged in sequence along the length direction of the first mounting seat, the multiple detection elements correspond to different load states of the traction chain / rope, respectively.

6. The load-matching speed-changing mechanism according to claim 5, characterized in that: The detection element adopts the following structural methods alone or in combination: Method 1, mechanical action detection method, the detection element is a rocker switch, a touch switch, or a pressure switch, and the detection feature is a touch plate; Method 2, photoelectric signal detection method, the detection element is a photoelectric counter-beam detection element, and the detection feature is a shading plate; Method 3, electromagnetic signal detection method, the detection element is a proximity switch, and the detection feature is a magnetic plate.

7. The load-matching variable speed running mechanism according to claim 1, characterized in that: The current detection unit includes a detection circuit and a trigger switch. The detection circuit is used to detect the current of the main drive circuit in the variable speed drive device. The trigger switch is set with a current threshold. When the detection circuit detects that the current of the main drive circuit reaches or exceeds the current threshold, the trigger switch sends a jump signal to the control device.

8. The load-matching variable speed running mechanism according to claim 1, characterized in that: The vehicle detection unit includes an object detection module, which is an ultrasonic detection device or a radar wave detection device, and the object detection module is arranged at the bottom of the vehicle board. The detection direction of the object detection module is the upper area of ​​the vehicle board, and it is used to detect whether there is a vehicle above the vehicle board, and send a corresponding switch signal to the control device.

9. The load-matching variable speed running mechanism according to claim 1, characterized in that: The load states of the traction chain / cable detected by the load detection device include at least a no-load state, a vehicle plate load state, an overload state and a normal load state. The operating states of the variable speed drive device include at least a high-speed operating state, a low-speed operating state and an emergency stop operating state. When the load detection device detects that the traction chain / cable is in the no-load state in the initial operating stage and in the vehicle plate load state in the normal operating stage, the control device controls the variable speed drive device to be in the high-speed operating state. When the load detection device detects that the traction chain / cable is in the normal load state in the normal operating stage, the control device controls the variable speed drive device to be in the low-speed operating state. When the load detection device detects that the traction chain / cable is in the overload state in the normal operating stage, the control device controls the variable speed drive device to be in the emergency stop operating state.

10. The load-matching speed-changing mechanism according to claim 1, characterized in that: The speed-changing operation mechanism also includes a backup traction unit, which includes an equipment frame, a second mounting seat, a second connecting module and a second compression module. The second mounting seat is mounted on the equipment frame, and the interior of the second mounting seat is hollow. The second compression module is installed in the second mounting seat. Two ends of the second connecting module extend out through two ends of the second mounting seat respectively, and one end of the second connecting module is used to connect the backup chain / rope. The second compression module is sleeved on the outer periphery of the second connecting module, and the first end of the second compression module faces the backup chain / rope and is close to the second mounting seat. The second end of the second compression module is constrained by the second connecting module. The backup chain / rope has the same detour path as the traction chain / rope, and when the traction chain / rope is in a normal state, the backup chain / rope does not bear the load. When the traction chain / rope is broken, the backup chain / rope replaces the traction chain / rope to bear the load.

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