Variable-speed running mechanism matched with load

Abstract

The utility model discloses a variable-speed running mechanism matched with load, 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 utility model has the advantages of low cost and high efficiency, and can avoid the risk of overweight load.

Description

Technical Field

[0001] This utility model relates to the field of parking equipment technology, and in particular to a variable speed operating mechanism for matching load. Background Technology

[0002] Currently, parking equipment is widely used. Among them, two-level lift-and-slide parking systems and simple two-level lift-and-slide parking systems with single or multiple parking spaces account for more than 50% of the market share. Two-level lift-and-slide parking systems using rear-mounted traction chain / cable drive, simple two-level lift-and-slide parking systems with multiple parking spaces, and simple single-space lift-and-slide parking systems using mid-mounted traction chain / cable drive occupy a certain market share due to their relatively low manufacturing costs. However, existing technologies do not take substantial measures to avoid the risk of overloading, and the current technology drives the lifting operation at a single speed, resulting in low efficiency (even with an empty platform, it can only operate at the normal load speed).

[0003] Therefore, how to solve the aforementioned defects of two-story lifting and traversing parking equipment with rear-mounted traction chain / cable drive, two-story simple lifting parking equipment with multiple parking spaces, and single-space simple lifting parking equipment with central traction chain / cable drive in a low-cost manner has become an urgent problem to be solved in the industry. Utility Model Content

[0004] The purpose of this invention is to provide a variable speed operating mechanism that matches the load, so as to solve the problems existing in the prior art, which is low in cost, high in efficiency, and can avoid the risk of overload.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a load-matching variable speed operating mechanism, including 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. The load detection device can be configured in any of the following three ways: 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, the deformation detection unit cooperating with the current detection unit and the... Any of the vehicle detection units may be used; Method 3: The load detection device includes the deformation detection unit, the current detection unit, and the vehicle detection unit, wherein the deformation detection unit is used in conjunction with both the current detection unit and the vehicle detection unit; The speed-changing drive device is used to drive the displacement of the traction end of the traction chain / cable; The control device can control the speed adjustment of the speed-changing drive device according to the load status signal detected by the load detection device; When the load detection device detects no load signal or an overload signal during the displacement of the traction chain / cable, the control device controls the speed-changing drive device to stop running and issues an alarm signal.

[0007] Preferably, the deformation detection unit includes a device frame, a first mounting base, a first connecting module, a first compression module, and a displacement detection module. The first mounting base is mounted on the device frame and is hollow inside. The first compression module is installed inside the first mounting base. Both ends of the first connecting module extend from both ends of the first mounting base, and one end of the first connecting module is used to connect to the traction chain / cable. 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 / cable and is in close contact with the first mounting base. The second end of the first compression module is constrained by the first connecting module. The displacement detection module includes a fixing component and a displacement component, which are respectively mounted on the first connecting module and the first mounting base. The displacement detection module is used to detect the displacement information generated by the first connecting module as the load on the vehicle body changes.

[0008] Preferably, the first connecting module includes an adjusting screw and a nut assembly. The two ends of the adjusting screw extend from the two ends of the first mounting base, and the first end of the adjusting screw is used to connect to the traction chain / cable. The second end of the adjusting screw has an external thread machined on its outer circumference. The first compression module is sleeved on the outer circumference 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 both the first nut and the second nut are threadedly connected to the adjusting screw. After adjustment, the first nut and the second nut can lock each other, so that the first nut and the second nut cannot rotate or displace relative to each other.

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

[0010] Preferably, the displacement detection module includes at least one detection element and at least one detection feature. When the detection element is a single element and is installed on the first connecting module constraining the first compression module, there are multiple detection features, all of which are installed on the first mounting base and arranged sequentially along the length of the first mounting base. Each of the multiple detection features corresponds to a different load state of the traction chain / cable. Alternatively, when the detection feature is a single element and is installed on the first connecting module constraining the first compression module, there are multiple detection elements, arranged sequentially along the length of the first mounting base. Each of the multiple detection elements corresponds to a different load state of the traction chain / cable.

[0011] Preferably, the detection element adopts one or a combination of the following structural methods: Method 1, mechanical action detection method, wherein 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, wherein the detection element is a photoelectric through-beam detection element, and the detection feature is a light shield; Method 3, electromagnetic signal detection method, wherein 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 transmission 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.

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

[0014] Preferably, the load states detected by the load detection device for the traction chain / cable include at least an unloaded state, a vehicle platform load state, an overloaded state, and a normal load state. The operating states of the transmission 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 unloaded state during the initial operating phase and in the vehicle platform load state during the normal operating phase, the control device controls the transmission drive device to operate in the high-speed operating state. When the load detection device detects that the traction chain / cable is in the normal load state during the normal operating phase, the control device controls the transmission drive device to operate in the low-speed operating state. When the load detection device detects that the traction chain / cable is in the overloaded state during the normal operating phase, the control device controls the transmission drive device to operate in the emergency stop operating state.

[0015] Preferably, the variable speed operating mechanism further includes a backup traction unit. The backup traction unit includes an equipment frame, a second mounting base, a second connecting module, and a second compression module. The second mounting base is mounted on the equipment frame and is hollow inside. The second compression module is installed inside the second mounting base. Both ends of the second connecting module extend from both ends of the second mounting base, and one end of the second connecting module is used to connect to the backup chain / cable. 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 / cable and is close to the second mounting base. The second end of the second compression module is constrained by the second connecting module. The backup chain / cable has the same routing path as the traction chain / cable. When the traction chain / cable is in normal condition, the backup chain / cable does not bear any load. When the traction chain / cable breaks, the backup chain / cable replaces the traction chain / cable in bearing the load.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] The variable speed operating mechanism for matching loads provided by this utility model includes 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 variable speed drive device is used to drive the traction end of the traction chain / cable to move at a reasonable speed. The control device can control the speed adjustment of the variable speed drive device according to the load state signal detected by the load detection device. The related 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 drive speed of the variable speed drive device, the operating efficiency is effectively improved;

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

[0020] 3. When the load detection device detects no load signal during the displacement of the traction chain / cable, it indicates that the traction chain / cable has broken. The control device controls the speed change drive to stop running and issues an alarm signal, which can reduce the accident risk caused by the breakage of the traction chain / cable, thereby reducing the risk of use.

[0021] 4. The load detection device can be configured by using a deformation detection unit alone, or by using a deformation detection unit in combination with a current detection unit or a vehicle detection unit, or by using a deformation detection unit in combination with both a current detection unit and a vehicle detection unit. It is flexible in its setup and has a simple overall structure and low cost.

[0022] 5. The backup traction unit can prevent the vehicle body from overturning due to the breakage of the traction chain / cable.

[0023] Therefore, this utility model can effectively improve the competitiveness of products and promote the healthy development of two-layer lifting and traversing parking equipment with rear-mounted traction chain / cable drive, two-layer simple lifting parking equipment with multiple parking spaces, and single-space simple lifting parking equipment with central traction chain / cable drive. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figures 1 to 8 In the speed-changing operating mechanism with matching load provided by this utility model, the load detection device adopts a deformation detection unit alone, and the spring body therein is a cylindrical spring. The relevant schematic diagram in Embodiment 1 is as follows:

[0026] Figure 1 This is a schematic diagram of Example 1 when the traction chain / cable is in an unloaded state;

[0027] Figure 2 This is a schematic diagram of Embodiment 1 when the traction chain / cable is under vehicle load.

[0028] Figure 3 This is a schematic diagram of Example 1 when the traction chain / cable is under normal load.

[0029] Figure 4 This is a schematic diagram of Example 1 when the traction chain / cable is under overload.

[0030] Figure 5 This is a diagram showing the positional correspondence between a detection feature and multiple detection elements when the traction chain / cable is in an unloaded state, as illustrated in Example 1.

[0031] Figure 6 This is a diagram showing the positional correspondence between one detection feature and multiple detection elements when the load borne by the traction chain / cable is equal to the load on the vehicle platform, as shown in Example 1.

[0032] Figure 7 This is a diagram showing the positional correspondence between a detection feature and multiple detection elements when the load borne by the traction chain / cable is greater than the vehicle load but less than the overload in Example 1.

[0033] Figure 8 This is a diagram showing the positional correspondence between a detection feature and multiple detection elements when the traction chain / cable is under an overload condition, as illustrated in Example 1.

[0034] In the diagram: 1-First mounting base, 2-Cylindrical spring, 3-Fixed base, 4-End cap, 5-Washer, 6-First nut, 7-Second nut, 8-Adjusting screw, 9-Equipment frame, 10-Overload detection element, 11-Car floor load detection element, 12-No-load detection element, 13-Detection feature. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] The purpose of this invention is to provide a variable speed operating mechanism that matches the load, so as to solve the problems existing in the prior art. It is low in cost, high in efficiency, and can avoid the risk of overload.

[0037] As mentioned above, this utility model provides a load-matching variable speed operating mechanism, which can be applied to two-story lifting and traversing parking equipment with rear-mounted traction chain / cable drive, two-story simple lifting parking equipment with multiple parking spaces, and single-space simple lifting parking equipment with mid-mounted traction chain / cable drive. The load-matching variable speed operating mechanism includes a control device, a load detection device and a variable speed drive device electrically connected to the control device. The load detection device is signal-connected to the control device. The load detection device directly or indirectly detects the current load state of the traction chain / cable, and the load state includes at least an unloaded state, a platform load state, an overloaded state, and a normal load state. The variable speed drive device is used to drive the displacement of the traction end of the traction chain / cable. By using a load detection device in conjunction with a variable speed drive device, the low efficiency of current technologies can be solved. The load state information detected by the load detection device... The information can be sent to the control device, which can then control the speed adjustment of the transmission drive device based on the load status signal detected by the load detection device. By detecting the load status of the traction chain / cable in real time and automatically adjusting the drive speed of the transmission drive device, the risk of overload can be effectively avoided. When the load detection device detects no load signal during the displacement of the traction chain / cable, it indicates that the traction chain / cable has broken. This is because during the displacement of the vehicle body driven by the traction chain / cable, there will be no no load signal except at the initial moment and when it reaches the stationary position. Otherwise, there will definitely be no no load signal unless the traction chain / cable breaks. Therefore, when the load detection device detects no load signal during the displacement of the traction chain / cable, the control device controls the transmission drive device to stop running and issues an alarm signal, which can prevent the vehicle body from overturning due to the breakage of the traction chain / cable.

[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: low-speed operation and high-speed operation. When the variable speed drive device is running, it can drive the traction end of the traction chain / rope to move, thereby driving the vehicle platform to rise or fall. The variable speed drive device is controlled by a switch switching signal to be in a high-speed operation state, a low-speed operation state, or an emergency stop operation state, respectively. The high-speed operation state corresponds to the no-load state in the initial operation stage of the traction chain / rope and the vehicle platform load state in the normal operation stage of the traction chain / rope. The low-speed operation state corresponds to the normal load state in the normal operation stage of the traction chain / rope. The emergency stop operation state corresponds to the overload state in the initial operation stage of the traction chain / rope and the normal operation stage.

[0039] For two-story lifting and traversing parking equipment with rear-mounted traction chain / cable drive, two-story simple lifting parking equipment with multiple parking spaces, and single-space simple lifting parking equipment with mid-mounted traction chain / cable drive, the "chain / cable" in traction chain / cable refers to a chain or steel cable, and "traction" refers to one end of the chain / cable being fixedly mounted on the equipment frame 9 of the load detection device, and the other end winding down from one side of the vehicle platform and up from the other side of the vehicle platform, finally connecting to the output end of the transmission drive device, and being driven by the transmission drive device to move, thereby raising or lowering the vehicle platform; when the traction chain / cable is a chain, the output end of the transmission drive device is a sprocket; when the traction chain / cable is a steel cable, the output end of the transmission 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] In the operating environment described in this invention, since the vehicle platform is driven to move up and down via a traction chain / cable, and the load on the vehicle platform is directly borne by the traction chain / cable, when a first compression module including a spring body is provided at the end of the traction chain / cable, and one end of the first compression module is fixedly mounted on the equipment frame 9, the current unloaded state, vehicle platform loaded state, and overloaded state of the traction chain / cable can be clearly distinguished by the deformation detection unit mounted on the first compression module, which detects the deformation displacement at the other end of the first compression module. Therefore, the variable speed operating mechanism with matching load provided by this invention can achieve all the functions required by the load detection device by using only the deformation detection unit.

[0042] In the operating environment described in this invention, since the platform is driven to move up and down by a lifting motor, the driving circuit of the lifting motor is called the main driving circuit. The voltage of the main circuit can be considered constant. The load on the platform is proportional to the current of the main driving circuit. The current unloaded state, platform load state, and overload state of the traction chain / cable can be clearly distinguished by detecting the current of the main driving circuit. Specifically, each transmission drive device's main driving circuit is equipped with a current detection unit to indirectly detect the current load state of the traction chain / cable. The current detection unit includes a detection circuit and a trigger switch. The detection circuit is used to detect the current of the main driving circuit; the trigger switch is set with a current threshold for 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 switches include an unloaded trigger switch, a platform 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 a no-load state for the traction chain / cable; the threshold of the platform load trigger switch corresponds to a platform load state for the traction chain / cable; and the threshold of the overload trigger switch corresponds to an overload state for the traction chain / cable. Therefore, the speed-changing operating mechanism with matching loads provided by this invention can also achieve all the functions required by the load detection device by using a deformation detection unit in conjunction with a current detection unit.

[0043] In the operating environment described in this invention, since the vehicle parked on the platform can be detected by the vehicle detection unit, a corresponding switching signal is sent to the control device to indirectly detect whether the traction chain / cable is currently under vehicle load. Therefore, the load-matching variable speed operating mechanism provided by this invention can also use a deformation detection unit in conjunction with the vehicle detection unit to achieve all the functions required by the load detection device.

[0044] Clearly, the variable speed operating mechanism with matching load provided by this utility model 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] Regarding the load state of the traction chain / cable detected by the load detection device:

[0046] The no-load state refers to the traction chain / cable having no other load besides its own weight. This can occur when the vehicle platform is stationary on the ground and supported by the ground, or when the vehicle platform is stationary on an upper level and supported by the fall arrestor, or when the traction chain / cable breaks during the vehicle platform's ascent or descent. Clearly, the no-load state corresponds to the spring body of the deformation detection unit being in its maximum extension state.

[0047] The vehicle platform load state refers to the traction chain / cable having only a vehicle platform load. This occurs when there is no load above the vehicle platform and the load is only the mass of the vehicle platform. Obviously, the vehicle platform load state corresponds to the spring body of the deformation detection unit being in the preset vehicle platform load deformation position, corresponds to the threshold current that the current detection unit detects to match the preset vehicle platform load, and corresponds to the state where the vehicle detection unit detects the presence of an object.

[0048] Overload condition refers to the load borne by the traction chain / cable exceeding the rated range. This occurs when the mass of the load on the vehicle platform is greater than the preset rated mass of the equipment, or when 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 condition corresponds to the spring body of the deformation detection unit being in the preset overload deformation position, and corresponds to the threshold current matched by the preset overload detected by the current detection unit.

[0049] Normal load condition refers to the load borne by the traction chain / cable being within the rated range. This occurs when the mass of the load on the platform above the vehicle is less than or equal to the rated mass preset by the equipment, or when the tension borne by the traction chain / cable is significantly less than or equal to the rated tension preset by the equipment. Normal load condition corresponds to the spring body of the deformation detection unit being in any position between the preset vehicle platform load deformation position and the preset overload deformation position. It also corresponds to any value between the preset threshold current matching the vehicle platform load and the preset threshold current matching the overload detected by the current detection unit.

[0050] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Example 1

[0052] like Figures 1-8 As shown, this embodiment provides a variable speed operating mechanism for matching loads. Its load detection device uses a deformation detection unit with a cylindrical spring 2 as the spring body. The displacement detection module uses a photoelectric through-beam detection element, and the detection feature 13 is a light-shielding plate. The advantages of this embodiment are: it uses only one load detection method, and its structure and control are relatively simple.

[0053] In this embodiment, each traction chain / cable is equipped with a load detection device. The load detection device is used to directly detect the current load state of the traction chain / cable and is set at the end of the traction chain / cable. Specifically, it includes an equipment frame 9, a first mounting base 1, a first compression module, a first connection module, and a displacement detection module. In this embodiment, the first compression module consists of a cylindrical spring 2, a fixing base 3, and an end cap 4; the first connection module consists 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. As shown in the figure, the first mounting base 1 is fastened to the equipment frame 9, and the first mounting base 1 is hollow inside. One end of the cavity inside the first mounting base 1 is a closed end, and the closed end has an opening that allows the end of the traction chain / cable to pass freely through. The first compression module is installed in the first mounting base 1 through the perforation. The two ends of the adjusting screw 8 of the first connecting module extend from the two ends of the first mounting base 1 respectively, and one end of the adjusting screw 8 (left end in the figure) is used to connect the traction chain / rope (not shown in the figure). The first compression module is located in the first mounting base 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. The first end of the first compression module (left end of the fixing seat 3 in the figure) faces the traction chain / rope and is close to the first mounting base 1. The second end of the first compression module (right end of the end cover 4 in the figure) is constrained by the first connecting module. The displacement detection module includes a fixing component and a displacement component, which are respectively installed on the first connecting module and the first mounting base 1. The displacement detection module is used to detect the displacement information generated by the first connecting module as the load on the vehicle plate changes.

[0054] The use of the fixed base 3, end cap 4 and cylindrical spring 2 together is a common practice. It can prevent the cylindrical spring 2 from undergoing deformation beyond its stability and enhance the pressure that the two ends of the cylindrical spring 2 can withstand.

[0055] As shown in the figure, 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 located close to the end cover 4 of the first compression module. 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 length of the adjusting screw 8 can be adjusted by the first nut 6 and the second nut 7. After the position is adjusted, the first nut 6 and the second nut 7 are locked together so that the first nut 6 and the second nut 7 cannot rotate or displace relative to each other.

[0056] The displacement detection module in this embodiment uses a detection feature 13 and multiple detection elements (namely, overload detection element 10, vehicle plate load detection element 11, and no load detection element 12). The detection elements are photoelectric beam detection elements, and the detection feature 13 is a light shield.

[0057] As shown in the figure, the shape of the detection feature 13 matches the detection component of the detection element, and can trigger the detection element to send an arrival signal and a departure signal. The multiple detection features 13 include at least a no-load detection feature, a vehicle platform 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 platform load detection feature corresponds to the position of the detection component of the detection element when there is only a vehicle platform and no vehicle, and 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 the compression state under overload.

[0058] The evaluation method in this embodiment (i.e., when there are multiple detection elements) is as follows:

[0059] Assuming there are no vehicles on the platform and it is stationary at ground level: Since the platform is supported by the ground, the spring body is currently in its 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 transmission drive device, causing the platform to rise, the platform load compresses the cylindrical spring 2, and the detection feature 13 moves away from the corresponding position of the no-load detection element 12. The signal output by the no-load detection element 12 is recognized by the control device as the start of a load. Since there are no vehicles on the platform, the position of the detection feature 13 always corresponds to the position of the platform load detection element 11. The signal output by the platform load detection element 11 is recognized by the control device as only the platform is present, and thus the output signal causes the transmission drive device to run at high speed.

[0060] The process of placing the vehicle on the upper level without any vehicle on the platform and then lowering it to the ground level is similar to that described above.

[0061] Assuming there is a vehicle on the platform with a mass less than or equal to the rated mass, and it is stationary at the ground level: Since the platform carrying the vehicle is supported by the ground, the spring body is currently in its 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 transmission drive device, causing the platform to rise, the vehicle and platform load compress the cylindrical spring 2, and the detection feature 13 moves away from the corresponding position of the no-load detection element 12. The signal output by the no-load detection element 12 is recognized by the control device as the beginning of a load. Since the platform carries the vehicle, the position of the detection feature 13 reaches and passes the position of the detection component of the platform load detection element 11, but does not reach the position corresponding to the detection component of the overload detection element 10. The signal output by the platform load detection element 11 is recognized by the control device as a platform with a normal load, and thus the output signal causes the transmission drive device to run at low speed.

[0062] The process of placing a vehicle with a mass less than or equal to the rated mass on the upper level and then lowering it to the ground level is similar to that described above.

[0063] When there is a vehicle on the platform with a mass greater than the rated mass (i.e., an overload), the traction chain / cable is driven by the transmission drive device to make the platform carrying the vehicle rise or fall: the overloaded platform compresses the cylindrical spring 2, and the position of the detection feature 13 will successively pass the no-load detection element 12 and the platform 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 an overload by the control device, and then the output signal causes the transmission drive device to stop running and alarm.

[0064] The following section further elaborates on the use of a deformation detection unit alone in the load detection device provided in this embodiment.

[0065] like Figure 1 As shown, the traction chain / cable is currently in an unloaded state. The tension on the traction chain / cable on the left side of the figure is the tension F0 of the traction chain / cable's own weight. At this time, the cylindrical spring 2 is in its maximum free extension state, and the right end of the adjusting screw 8 is in the unloaded position A0.

[0066] like Figure 2 As shown, the traction chain / cable is currently under vehicle load. The tension on the traction chain / cable on the left side of the diagram is the vehicle load tension F1. The cylindrical spring 2 is in the initial compression state. The right end of the adjusting screw 8 is at the vehicle load position A1. The stroke of the adjusting screw 8 shown in the diagram is the vehicle load stroke a1, which is also the stroke of the end cover 4.

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

[0068] like Figure 4 As shown, the traction chain / cable is currently under overload. The tension on the traction chain / cable on the left side of the diagram is the overload tension F3. The cylindrical spring 2 has reached its 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 shown in the diagram is the overload stroke a3, which is also the stroke of the end cover 4.

[0069] As is well known to those skilled in the art, the typical mass of a vehicle platform is approximately 500 kg; the rated mass of a vehicle is related to the type of vehicle that the parking equipment allows to be parked, and is generally 1700 kg, 2000 kg, or 2300 kg, approximately three to four times the mass of the vehicle platform; while the standard for overload is usually 120% of the rated mass. That is to say, as long as a cylindrical spring 2 with appropriate stiffness and compression ratio is selected, the travel distance of the end cap 4 between no load and vehicle platform load is sufficient to arrange the detection element or detection feature 13 to distinguish between no load and vehicle platform load; similarly, the travel distance of the end cap 4 between vehicle platform load and overload is also sufficient to arrange the detection element or detection feature 13 to distinguish between vehicle platform load and overload; and the area between vehicle platform load and overload should be considered a normal load.

[0070] like Figures 5-8 As shown, this embodiment takes the setting of multiple detection elements and one detection feature 13 as an example. The first mounting base 1 is equipped with an overload detection element 10, a vehicle plate load detection element 11 and a no-load detection element 12 from left to right, and the end cover 4 is equipped with a detection feature 13.

[0071] like Figure 5 As shown, the traction chain / cable is currently in an unloaded state, and the cylindrical spring 2 is in its maximum free extension state. At this time, the detection feature 13 blocks the optical channel of the unloaded detection element 12, and the unloaded detection element 12 sends a jump signal, indicating that it is currently in an unloaded state.

[0072] like Figure 6As shown, the load borne by the traction chain / cable is exactly equal to the load on the vehicle platform. The cylindrical spring 2 is compressed, causing the detection feature 13 to block the optical channel of the vehicle platform load detection element 11. The vehicle platform load detection element 11 sends a jump signal, indicating that it is currently in the vehicle platform load state. At this time, the optical channel of the no-load detection element 12 is turned on, 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 load but less than the overload detection. The cylindrical spring 2 is further compressed, causing the detection feature 13 to move away from the corresponding position of the vehicle load detection element 11. The optical channel of the vehicle load detection element 11 is turned on, and the vehicle load detection element 11 sends a jump signal, indicating that it has left the vehicle load state. Since the optical channel of the overload detection element 10 is turned on at this time, it can be determined that it is currently in the normal load state.

[0074] like Figure 8 As shown, the current load of the traction chain / cable reaches the overload state, 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 the overload state.

[0075] In this embodiment, the spring body consists of a single cylindrical compression spring. In other embodiments, the spring body may consist of a disc spring or multiple cylindrical compression springs with different compression ratios. In fact, if the cylindrical spring 2 in this embodiment is replaced with two cylindrical compression springs with different compression ratios, and the cylindrical compression spring located on the right end of the diagram has a relatively large rate of deformation under compression, the installation distance between the vehicle load detection element 11 and the no-load detection element 12 will be similar to the installation distance between the vehicle load detection element 11 and the overload detection element 10, thereby further improving the relevant detection accuracy.

[0076] Example 2

[0077] This embodiment adopts a structure similar to that of Embodiment 1, but instead uses one detection element and multiple detection features 13, which is equivalent to the structure in Embodiment 1. Figures 5 to 8 The reference numerals "10", "11", and "12" in the attached drawings are respectively equipped with overload detection features, vehicle platform load detection features, and no-load detection features. A detection element is installed at reference numeral "13". The advantage of this embodiment is that it uses only one load detection method, and the structure and control are relatively simple. The corresponding inspection method (refer to the attached drawings of Embodiment 1) can be described as follows:

[0078] Assuming there are no vehicles on the platform and it is stationary at ground level: Because the platform is supported by the ground, the spring body is currently in its 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 interpreted by the control device as no load. When the traction chain / cable is driven by the transmission drive device, causing the platform to rise, the platform load compresses the cylindrical spring 2, and the detection component of the detection element moves away from its previous position corresponding to the no-load detection feature. The signal output by the detection element is interpreted by the control device as the beginning of a load. Since there are no vehicles on the platform, the position of the detection element always corresponds to the position of the platform load detection feature, and the signal output by the detection element is interpreted by the control device as only the platform is present. Therefore, the output signal causes the transmission drive device to run at high speed.

[0079] The process of placing the vehicle on the upper level without any vehicle on the platform and then lowering it to the ground level is similar to that described above.

[0080] Assuming a vehicle with a mass less than or equal to its rated mass is on the platform and stationary at ground level: Since the platform carrying the vehicle is supported by the ground, the cylindrical spring 2 is currently in its 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 transmission drive device, causing the platform carrying the vehicle to rise, the load of the vehicle and the platform compresses the cylindrical spring 2, and the detection component of the detection element moves away from the position previously corresponding to the no-load detection feature. The signal output by the detection element is recognized by the control device as the beginning of a load. Since the platform carries the vehicle, the position of the detection element reaches and passes the position of the platform load detection feature, but does not reach the position corresponding to the overload detection feature. The signal output by the detection element is recognized by the control device as a platform with a normal load, and the output signal causes the transmission drive device to run at low speed.

[0081] The process of placing a vehicle with a mass less than or equal to the rated mass on the upper level and then lowering it to the ground level is similar to that described above.

[0082] When there is a vehicle on the platform with a mass greater than the rated mass (i.e., an overload), the traction chain / cable is driven by the transmission drive device to make the overloaded platform move up or down: the overloaded platform compresses the cylindrical spring 2, and the position of the detection element will successively pass the no-load detection feature and the platform load detection feature, and finally reach the corresponding position of the overload detection feature. The signal output by the detection element is identified as an overload by the control device, and then the output signal stops the transmission drive device and triggers an alarm.

[0083] Example 3

[0084] This embodiment uses a deformation detection unit in conjunction with a current detection unit, where the deformation detection unit is only responsible for no-load detection and vehicle body load detection (i.e., Embodiment 1). Figures 5 to 8 The overload detection element 10 shown is cancelled, and the overload is detected by the current detection unit (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 on the traction chain / cable is greater than the load on the vehicle platform, the cylindrical spring 2 is fully 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 in the equipment, which can give full play to the effectiveness of related facilities and save costs.

[0086] The examination method corresponding to this embodiment (refer to the attached diagram of Embodiment 1) can be described as follows:

[0087] Assuming there are no vehicles on the platform and it is stationary at ground level: Since the platform is supported by the ground, the spring body is currently in its 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 transmission drive device, causing the platform to rise, the platform load compresses the cylindrical spring 2, and the detection feature 13 moves away from its previous position corresponding to the no-load detection element 12. The signal output by the no-load detection element 12 is recognized by the control device as the beginning of a load. Since there are no vehicles on the platform, the position of the detection feature 13 always corresponds to the position of the platform load detection element 11. The signal output by the platform load detection element 11 is recognized by the control device as only the platform is present, and thus the output signal causes the transmission drive device to run at high speed.

[0088] The process of placing the vehicle on the upper level without any vehicle on the platform and then lowering it to the ground level is similar to that described above.

[0089] Assuming a vehicle with a mass less than or equal to its rated mass is placed statically on the ground level: Since the vehicle-carrying platform is supported by the ground, the cylindrical spring 2 is currently in its 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 transmission drive device, causing the vehicle-carrying platform to rise, the load of the vehicle and the platform compresses the cylindrical spring 2, and the detection feature 13 moves away from its previous position corresponding to the no-load detection element 12. The signal output by the no-load detection element 12 is recognized by the control device as the beginning of a load. Since the platform carries the vehicle, the position of the detection feature 13 reaches and passes the position of the platform load detection element 11. As long as the current detection unit does not issue an overload signal, it is considered a platform with normal load, and the output signal causes the transmission drive device to run at low speed.

[0090] The process of placing a vehicle with a mass less than or equal to the rated mass on the upper level and then lowering it to the ground level is similar to that described above.

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

[0092] Example 4

[0093] This embodiment uses 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., embodiment one). Figures 5 to 8 The overload detection element 10 and the vehicle plate load detection element 11 shown are both cancelled. The overload 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 detecting the vehicle plate load.

[0094] The advantages of this embodiment are: 1. Once the traction chain / cable bears a load, the cylindrical spring 2 is fully 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 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 detection of the load on the vehicle platform, which is more intuitive and convenient.

[0095] The examination method corresponding to this embodiment (refer to the attached diagram of Embodiment 1) can be described as follows:

[0096] Assuming there are no vehicles on the platform and it is stationary at ground level: Since the platform is supported by the ground, the spring body is currently in its 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 transmission drive device, causing the platform to rise, the platform load compresses the cylindrical spring 2, and the detection feature 13 moves away from its previous position corresponding to the no-load detection element 12. The signal output by the no-load detection element 12 is recognized by the control device as the beginning of a load. Since there are no vehicles on the platform, the position of the detection feature 13 always corresponds to the position of the platform load detection element 11. The signal output by the platform load detection element 11 is recognized by the control device as only the platform is present, and thus the output signal causes the transmission drive device to run at high speed.

[0097] The process of placing the vehicle on the upper level without any vehicle on the platform and then lowering it to the ground level is similar to that described above.

[0098] Assuming there is a vehicle with a mass less than or equal to the rated mass on the platform, and it is stationary at the ground level: Since the platform carrying the vehicle is supported by the ground, the cylindrical spring 2 is currently in its 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 transmission drive device and causes the platform carrying the vehicle to rise, the load of the vehicle and the platform causes the cylindrical spring 2 to be compressed, and the detection feature 13 moves away from the position previously corresponding to the no-load detection element 12. The signal output by the no-load detection element 12 is recognized by the control device as the beginning of a load. Since the vehicle detection unit detects the presence of a vehicle, as long as the current detection unit does not issue an overload signal, the control device recognizes the platform as having a normal load, and thus outputs a signal to make the transmission drive device run at low speed.

[0099] The process of placing a vehicle with a mass less than or equal to the rated mass on the upper level and then lowering it to the ground level is similar to that described above.

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

[0101] The backup traction unit is further described below. The function of the backup traction unit is to further enhance the operational safety of the load-matching variable speed operating mechanism provided by this invention.

[0102] As described above, the backup traction unit includes an equipment frame 9, a second mounting base, a second connecting module, and a second compression module. The second mounting base is mounted on the equipment frame 9 and is hollow inside. The second compression module is installed inside the second mounting base. The two ends of the second connecting module extend from the two ends of the second mounting base, and one end of the second connecting module is used to connect to the backup chain / cable. 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 / cable and is close to the second mounting base. The second end is constrained by the second connecting module. The backup chain / cable has the same routing path as the traction chain / cable. When the traction chain / cable is in a normal state, the backup chain / cable does not bear any load. When the traction chain / cable breaks, the backup chain / cable replaces the traction chain / cable in bearing the load. To facilitate the implementation of the above functions, the backup chain / cable and the traction chain / cable must operate synchronously. Therefore, the backup chain / cable should adopt the same type and parameters as the traction chain / cable, and its total length should be greater than that of the traction chain / cable, so that the backup chain / cable is in a slack state when the traction chain / cable is in a normal state.

[0103] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A variable speed operating mechanism for matching loads, characterized by: The control device, the load detection device and the variable speed driving device are electrically connected; the load detection device is used to detect the load state of the traction chain / cable; the load detection device is composed of any one of the following three modes: mode one, the load detection device includes a deformation detection unit, and the deformation detection unit is used alone; mode two, 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 is used in cooperation with any one of the current detection unit and the vehicle detection unit; 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 cooperation with the current detection unit and the vehicle detection unit at the same time; the variable speed driving device is used to drive the displacement of the traction end of the traction chain / cable; the control device can control the variable speed driving device to adjust the speed according to the load state signal detected by the load detection device; when the load detection device detects no load signal or an overload signal during the displacement of the traction chain / cable, the control device controls the variable speed driving device to stop running and sends an alarm signal.

2. A variable ratio operating mechanism matching load according to claim 1, characterized in that: The deformation detection unit includes a device rack, a first mounting seat, a first connecting module, a first compression module and a displacement detection module; the first mounting seat is mounted on the device rack, and the first mounting seat is hollow inside; the first compression module is mounted in the first mounting seat; the two ends of the first connecting module respectively extend out of the two ends of the first mounting seat, and one end of the first connecting module is used to connect the traction chain / cable; 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 / cable and is tightly attached 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 mounted 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 caused by the change of the vehicle load.

3. A variable ratio operating mechanism matching load according to claim 2, characterized in that: The first connecting module includes an adjusting screw and a nut assembly; the two ends of the adjusting screw respectively extend out of the two ends of the first mounting seat, and the first end of the adjusting screw is used to connect the traction chain / cable; the second end of the adjusting screw is provided with external threads 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; the first nut and the second nut are both threadedly connected with the adjusting screw; and the first nut and the second nut can be locked with each other after being adjusted in place, so that the first nut and the second nut cannot rotate or displace relative to each other.

4. The matched load variable operating mechanism of claim 2, wherein: 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.

5. The matched load variable operating mechanism of claim 2, wherein: The displacement detection module comprises at least one detection element and at least one detection feature, the detection element is one, and the detection element is installed on the first connecting module for restricting the first compression module, the detection feature is multiple, and multiple detection features are installed on the first mounting seat and arranged in sequence along the length direction of the first mounting seat, and multiple detection features correspond to different load states of the traction chain / cable respectively, or the detection feature is one, and the detection element is multiple when the detection feature is installed on the first connecting module for restricting the first compression module, and multiple detection elements are arranged in sequence along the length direction of the first mounting seat, and multiple detection elements correspond to different load states of the traction chain / cable respectively.

6. A variable ratio operating mechanism matching load according to claim 5, characterized in that: The detection element is used alone or in a mixed manner in the following structural modes: mode one, mechanical action detection mode, the detection element is a rocker switch or a touch switch or a pressure switch, and the detection feature is a touch plate; mode two, photoelectric signal detection mode, the detection element is a photoelectric opposite-shooting detection element, and the detection feature is a light-shielding plate; mode three, electromagnetic signal detection mode, the detection element is a proximity switch, and the detection feature is a magnetic plate.

7. The matched load variable operating mechanism of claim 1, wherein: The current detection unit comprises a detection circuit and a trigger switch, the detection circuit is used for detecting the current of the main drive circuit in the variable-speed drive device, the trigger switch is provided with a current threshold, and 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 matched load variable operating mechanism of claim 1, wherein: The vehicle detection unit comprises an object detection module, the object detection module is an ultrasonic detection device or a radar wave detection device, the object detection module is arranged at the bottom of the vehicle plate, the detection direction of the object detection module is the upper region of the vehicle plate, and the object detection module is used for detecting whether there is a vehicle above the vehicle plate and sending a corresponding switching signal to the control device.

9. The matched load variable operating mechanism of claim 1, wherein: The load detection device detects the load state of the traction chain / cable, which includes at least no-load state, car plate load state, overload load state and normal load state, the operating state of the variable speed driving device includes at least high speed operating state, low speed operating state and emergency stop operating state, when the load detection device detects that the traction chain / cable is in the no-load state of the initial operating stage and in the car plate load state of the normal operating stage, the control device controls the variable speed driving 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 of the normal operating stage, the control device controls the variable speed driving device to be in the low speed operating state, and when the load detection device detects that the traction chain / cable is in the overload load state of the normal operating stage, the control device controls the variable speed driving device to be in the emergency stop operating state.

10. The matched load variable operating mechanism of claim 1, wherein: The variable speed operating mechanism further comprises a backup traction unit, which comprises an equipment rack, a second mounting seat, a second connecting module and a second compression module, the second mounting seat is mounted on the equipment rack and is hollow inside, the second compression module is mounted in the second mounting seat, the two ends of the second connecting module respectively extend out of the two ends of the second mounting seat, one end of the second connecting module is used for connecting a backup chain / cable, the second compression module is sleeved on the outer periphery of the second connecting module, the first end of the second compression module faces the backup chain / cable 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 / cable has the same running path as the traction chain / cable, and when the traction chain / cable is in a normal state, the backup chain / cable does not bear load, and when the traction chain / cable breaks, the backup chain / cable bears load instead of the traction chain / cable.

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